Installation list

OS/distribution	Name	Version	Installation variant name	Platforms	Installation provided by	Original image source URL
1401 Autocoder	1401 Autocoder		No IOCS macros; from Dick Weaver	IBM 1401
1401 Autocoder	1401 Autocoder		With IOCS macros; from Paul Pierce	IBM 1401
1401 Diagnostic Tape	1401 Diagnostic Tape			IBM 1401
1401 Fortran	1401 Fortran	V3M0		IBM 1401
1401 Fortran	1401 Fortran	V3M4		IBM 1401
1401 SPS	SPS			IBM 1401
1401 standalone software collection	1401 standalone software collection (ROPE)			IBM 1401
1401 standalone software collection	1401 standalone software collection (SIMH CLI)			IBM 1401
1410 Diagnostics Tape	1410 Diagnostics Tape			IBM 1410/7010
1616/OS	1616/OS	3.0b		Applix 1616
1620 BANDIT	1620 BANDIT			IBM 1620
1620 Baseball (BBC)	1620 Baseball (BBC)			IBM 1620
1620 SPS	1620 SPS 99 Bottles of Beer demo			IBM 1620
1620 Tic-Tac-Toe	1620 Tic-Tac-Toe			IBM 1620
1700 MSOS	1700 MSOS	5.0	Exxon development system	CDC 1700/Cyber 18		Link
1B	1B/V3	3.0	Demo	x86 PC	Andrew Warkentin
2BSD	2.10.1BSD			PDP-11 (Unibus/Qbus-based)	Andrew Warkentin
2BSD	2.11BSD	PL 400		PDP-11 (Unibus/Qbus-based)
2BSD	2.9BSD			PDP-11 (Unibus/Qbus-based)	Andrew Warkentin
386BSD	386BSD	1.0		x86 PC
3BSD/4BSD	3BSD			VAX		Link
3BSD/4BSD	4.0BSD			VAX		Link
3BSD/4BSD	4.1BSD			VAX	Jason Stevens (neozeed)	Link
3BSD/4BSD	4.1cBSD			VAX	Jason Stevens (neozeed)	Link
3BSD/4BSD	4.2BSD			VAX	Andrew Warkentin
3BSD/4BSD	4.3BSD			VAX	Jason Stevens (neozeed)	Link
3BSD/4BSD	4.3BSD-Quasijarus0c			VAX	Andrew Warkentin
3BSD/4BSD	4.3BSD-Reno			VAX	Andrew Warkentin
3BSD/4BSD	4.4BSD for LUNA 68k			LUNA (68k-based)		Link
3BSD/4BSD	University of Wisconsin 4.3BSD			VAX	Jason Stevens (neozeed)	Link
42nix	42nix	2.6		NS32k-based Whitechapel workstations (MG-1/CG-1/MG-200)
709x LISP/Overlord	7090 LISP/Overlord	1.5		IBM 704x/709x	Bob Abels, Roberto Sancho Villa
86-DOS (reference version)	86-DOS	0.1c		Cromemco S100 systems
86-DOS (reference version)	86-DOS	0.34		Cromemco S100 systems
86-DOS (reference version)	86-DOS	1.0		Cromemco S100 systems	Peter Schorn	Link
8D DOS	8D DOS	1.0		Oric machines (inc. clones)
8D DOS	8D DOS	1.30		Oric machines (inc. clones)
8D DOS	8D DOS	2.10		Oric machines (inc. clones)
8D DOS	8D DOS	2.31		Oric machines (inc. clones)
9825 HPL	HP 9825A HPL			HP 9825 and derivatives
9825 HPL	HP 9825B HPL			HP 9825 and derivatives
9825 HPL	HP 9825T HPL			HP 9825 and derivatives
9845B BASIC	HP 9845B BASIC			HP 9845
9845B BASIC	HP 9845C BASIC			HP 9845
9845B BASIC	HP 9845T BASIC			HP 9845
9AP	9AP			IBM 704x/709x	Richard Cornwell, Roberto Sancho Villa
9front	9front	10277 “humanbiologics”		x86 PC	Andrew Warkentin
a-linux	a-linux	0.17		x86 PC
A/UX	A/UX	1.1.1		Macintosh (68k-based)
A/UX	A/UX	2.0		Macintosh (68k-based)
A/UX	A/UX	3.0		Macintosh (68k-based)
A/UX	A/UX	3.1.1		Macintosh (68k-based)	Andrew Warkentin
ABCDOS	ABC-DOS	1.0		ABC 80/800 series
ABCenix	ABCenix	5.18		ABC 1600
Accent	Accent	S4		PERQ	Josh Dersch	Link
Accent	Accent	S6		PERQ	Skeezics Boondoggle	Link
Access Linux Platform Garnet VM test system	Access Linux Platform Garnet VM test system	5.5.0		Palm devices (ARM-based)
ACE	ACE	0.99		Commodore 128, Commodore 64	Andrew Warkentin
Acorn DOS for System 3	Acorn DOS for System 3			Acorn Eurocard Systems
ADOS (RT-11) for UKNC	ADOS (RT-11) for UKNC	5.0		UKNC (MS 0511)
ADOS (RT-11) for UKNC	ADOS (RT-11) for UKNC	6.4		UKNC (MS 0511)
ADSS-15/FB	ADSS-15/FB	4A		PDP-15, PDP-9		Link
ADSS-15/KMS	ADSS-15/KMS	5B		PDP-15, PDP-9		Link
AFROS	AFROS	2005-04-24		Atari ST/TT/Falcon
AFROS	AFROS (XaAES)	8.12		Atari ST/TT/Falcon		Link
AFROS	AFROS/MyAeS	2005-10-21		Atari ST/TT/Falcon
Agat booter software collection	Agat booter software collection			Agat
Agat DOS	Agat DOS (English messages)	3.3		Agat
Agat DOS	Agat DOS (Russian messages)	3.3		Agat
Agat DOS	Agat MicroDOS	3.3		Agat
AGC Exec	AGC Exec collection			Apollo Guidance Computer
AGC Exec	Artemis	71 (Apollo 15-17 CM, prerelease)		Apollo Guidance Computer
AGC Exec	Artemis	72 (Apollo 15-17 CM, mission)		Apollo Guidance Computer
AGC Exec	Aurora	12 (LM check-out, early version)		Apollo Guidance Computer
AGC Exec	Aurora	88 (LM check-out)		Apollo Guidance Computer
AGC Exec	Borealis (modern LM check-out program)			Apollo Guidance Computer
AGC Exec	Colossus	237 (Apollo 8 CM)		Apollo Guidance Computer
AGC Exec	Colossus	249 (Apollo 9 CM)		Apollo Guidance Computer
AGC Exec	Comanche	44 (Apollo 10 CM, prerelease)		Apollo Guidance Computer
AGC Exec	Comanche	45 (Apollo 10 CM, prerelease)		Apollo Guidance Computer
AGC Exec	Comanche	45r2 (Apollo 10 CM, mission)		Apollo Guidance Computer
AGC Exec	Comanche	51 (Apollo 11 CM, prerelease)		Apollo Guidance Computer
AGC Exec	Comanche	55 (Apollo 11 CM, prerelease)		Apollo Guidance Computer
AGC Exec	Corona	261 (AS-202 a.k.a. “Apollo 3” CM)		Apollo Guidance Computer
AGC Exec	Luminary	099 (Apollo 11 LM, mission)		Apollo Guidance Computer
AGC Exec	Luminary	099r0 (Apollo 11 LM, prerelease)		Apollo Guidance Computer
AGC Exec	Luminary	116 (Apollo 12 LM)		Apollo Guidance Computer
AGC Exec	Luminary	130 (Apollo 13 LM, prerelease)		Apollo Guidance Computer
AGC Exec	Luminary	131 (Apollo 13 LM, prerelease)		Apollo Guidance Computer
AGC Exec	Luminary	131r1 (Apollo 13 LM, mission)		Apollo Guidance Computer
AGC Exec	Luminary	163 (Apollo 14 LM, prerelease)		Apollo Guidance Computer
AGC Exec	Luminary	173 (Apollo 14 LM, prerelease)		Apollo Guidance Computer
AGC Exec	Luminary	178 (Apollo 14 LM, prerelease)		Apollo Guidance Computer
AGC Exec	Luminary	210 (Apollo 15-17 LM, mission)		Apollo Guidance Computer
AGC Exec	Luminary	69r0 (Apollo 10 LM, prerelease)		Apollo Guidance Computer
AGC Exec	Luminary	69r2 (Apollo 10 LM, mission)		Apollo Guidance Computer
AGC Exec	Retread	44 (Block II LM early prerelease, OS code only)		Apollo Guidance Computer
AGC Exec	Retread	50 (Block II LM early prerelease, OS code only)		Apollo Guidance Computer
AGC Exec	Solarium	055 (Apollo 4/6 CM)		Apollo Guidance Computer
AGC Exec	Sunburst	120 (Apollo 5 LM)		Apollo Guidance Computer
AGC Exec	Sunburst	37 (Apollo 5 LM, prerelease)		Apollo Guidance Computer
AGC Exec	Sundance	306 (Apollo 9 LM)		Apollo Guidance Computer
AGC Exec	Sundial	E (2TV-1 CM)		Apollo Guidance Computer
AGC Exec	Sunrise	45 (Block I CM test)		Apollo Guidance Computer
AGC Exec	Sunrise	69 (Block I CM test)		Apollo Guidance Computer
AGC Exec	Zerlina	56 (experimental LM software, never flown)		Apollo Guidance Computer
Airemix AireOS	Airemix AireOS	0.14.149		x86 PC
Aisix	AISIX	pre-1.0 2025-08-26		XR/station
AIX PS/2 and 370	AIX PS/2	1.3		x86 PC	Andrew Warkentin
AIX/6000	AIX	4.3.3		PReP-compatible machines	Andrew Warkentin
Alf games collection	Alf games collection			Alf
Altair cassette/paper tape BASIC	Altair BASIC	3.2 (4k version)		Altair	Peter Schorn	Link
Altair cassette/paper tape BASIC	Altair BASIC	4.0 (16k extended version)		Altair	Peter Schorn	Link
Altair cassette/paper tape BASIC	Altair BASIC	4.0 (8k version)		Altair	Peter Schorn	Link
Altair Disk Extended BASIC	Altair Disk Extended BASIC	300-5-C		Altair		Link
Altair Disk Extended BASIC	Altair Disk Extended BASIC	4.1		Altair		Link
Altair Disk Extended BASIC	Altair Disk Extended BASIC	5.0		Altair		Link
Altair DOS	Altair DOS	1.0		Altair		Link
Alto OS	Alto OS	18/16	Games	Alto
Alto OS	Alto OS	18/16	Smalltalk-76	Alto
Alto OS	Alto OS	19/16	BravoX	Alto
Alto OS	Alto OS	20/16	BCPL	Alto
Alto OS	Alto OS	20/16	Diagnostics	Alto
Amiga UNIX	Amiga UNIX (AMIX)	2.1c		Amiga (68k-based)	Andrew Warkentin
AmigaOS	AmigaOS	1.3		Amiga (68k-based)
AmigaOS	AmigaOS	2.04		Amiga (68k-based)
AmigaOS	AmigaOS	3.1		Amiga (68k-based)
AmigaOS	AmigaOS	3.9		Amiga (68k-based)
AmigaOS	AmigaOS (UAEBench)	3.1		Amiga (68k-based)
AMOS	AMOS	4.6		AM-100 (WD-16 based)	Mike Noel	Link
AMOS	AMOS	5.0		AM-100 (WD-16 based)
Amstrad NC OS	NC100 OS	1.00		NC-100/NC-150/NC-200
Amstrad NC OS	NC100 OS	1.06		NC-100/NC-150/NC-200
Amstrad NC OS	NC200 OS	2.01		NC-100/NC-150/NC-200
ANDOS	ANDOS	3.1		BK 0010/BK 0011
ANDOS	ANDOS	3.30		BK 0010/BK 0011
Android	Android (alpha)	0.5 Milestone 3 RC20a		Android devices (ARM-based)
Android	Android (alpha)	0.5 Milestone 3 RC22a		Android devices (ARM-based)
Android	Android (alpha)	0.5 Milestone 3 RC37a		Android devices (ARM-based)
Android	Android (alpha)	0.5 Milestone 5 RC14		Android devices (ARM-based)
Android	Android (alpha)	0.5 Milestone 5 RC15		Android devices (ARM-based)
Android	Android (AOSP)	1.1 (Petit Four)		Android devices (ARM-based)
Android	Android (AOSP)	1.5 (Cupcake)		Android devices (ARM-based)
Android	Android (AOSP)	1.6 (Donut)		Android devices (ARM-based)
Android	Android (AOSP)	2.1 (Eclair)		Android devices (ARM-based)
Android	Android (AOSP)	2.2 (Froyo)		Android devices (ARM-based)
Android	Android (AOSP)	2.3.3 (Gingerbread)		Android devices (ARM-based)
Android	Android (AOSP)	3.0 (Honeycomb)		Android devices (ARM-based)
Android	Android (beta)	0.6 Beta 0.9_r1-98467		Android devices (ARM-based)
Android	Android (beta)	1.0 (build 119366)		Android devices (ARM-based)
AO-DOS	AO-DOS	1.77		BK 0010/BK 0011
AO-DOS	AO-DOS	2.10		BK 0010/BK 0011
AOS (16-bit)	Eclipse AOS	7.00		Eclipse	Bruce Ray	Link
AOS (16-bit)	MP/AOS	2.00		Eclipse	Bruce Ray	Link
AOS/VS (original)	AOS/VS	7.73		MV series	Bruce Ray	Link
AOS/VS II	AOS/VS II	3.21		MV series	Bruce Ray	Link
APE(X)C software collection	APE(X)C software collection			APEC machines
APF BASIC	APF BASIC			APF Imagination Machine/M-1000/MP-1000
APL\1130	APL\1130			IBM 1130		Link
Apple DOS 3	Apple DOS	3.3	Apple 3 Diagnostics	Apple III
Apple DOS 3	Apple DOS	3.3	Elk Cloner Source	8-bit Apple II series	Rich Skrenta
Apple DOS 3	Apple DOS	3.3	Journey from the End of Time	8-bit Apple II series	Rich Skrenta
Apple DOS 3	Apple DOS	3.3	Master	8-bit Apple II series
Apple DOS 3	Apple DOS	3.3	MUSYS	8-bit Apple II series	Rich Skrenta
Apple Pascal	Apple Pascal	1.1	Master	8-bit Apple II series
Apple Pascal	Apple Pascal	1.3	Old IIgs Tour	Apple IIgs
Apricot CP/M-86 (F1)	Apricot CP/M-86	3.1	DR Logo for Apricot F1	Apricot PC family
Apricot MS-DOS	Apricot MS-DOS	2.11	Apricot F1 Activity	Apricot PC family
Apricot MS-DOS	Apricot MS-DOS	2.11	Apricot F1 Field Service Tests	Apricot PC family
Apricot MS-DOS	Apricot MS-DOS	2.11	GEM 1.2 for Apricot F1	Apricot PC family
AROS	AROS	2007-11-29 (x86-64)		x86 PC
AROS One	AROS One	2.0		x86 PC	Andrew Warkentin
AROS Vision	AROS Vision	2022		Amiga (68k-based)
AROS-Max	AROS-Max	2004-10-09		x86 PC	Andrew Warkentin
ARX	ARX	0.1		x86 PC	Andrew Warkentin
Asterix	Asterix	1991-09-27		Commodore 64	Andrew Warkentin
AT&T Research Unix	AT&T Research Unix	1st Edition (reconstructed)		PDP-11 (Unibus/Qbus-based)	Warren Toomey	Link
AT&T Research Unix	AT&T Research Unix	4th Edition (June 1974; tape from University of Utah)		PDP-11 (Unibus/Qbus-based)		Link
AT&T Research Unix	AT&T Research Unix	5th Edition (March 1975)		PDP-11 (Unibus/Qbus-based)		Link
AT&T Research Unix	AT&T Research Unix	6th Edition		PDP-11 (Unibus/Qbus-based)		Link
AT&T Research Unix	AT&T Research Unix	7th Edition		PDP-11 (Unibus/Qbus-based)		Link
AT&T Research Unix	AT&T Research Unix	8th Edition		VAX	Jason Stevens (neozeed)	Link
AT&T Research Unix	AT&T Research Unix	9th Edition		Sun-3 series	Jason Stevens (neozeed)	Link
AT&T Research Unix	AT&T Research Unix (gbaunix)	5th Edition (emulator version 0.0)		Game Boy Advance
AT&T Research Unix for PDP-7	AT&T Research Unix	“Version 0” a.k.a. “Unix-7”		PDP-7	Warren Toomey	Link
AT&T System III	AT&T System III for PDP-11	3.0.1		PDP-11 (Unibus/Qbus-based)	Andrew Warkentin
AT&T System III	AT&T System III for VAX	3.0.1		VAX
AT&T System V	AT&T System V for PDP-11	Release 1		PDP-11 (Unibus/Qbus-based)	Andrew Warkentin
AT&T System V	AT&T System V R2 for VAX			VAX	Jason Stevens (neozeed)
AT&T System V for 3b series	AT&T System V for 3b2	Release 3.2 Version 2		WE32K-based 3b machines	Seth Morabito	Link
AT&T System V/386	AT&T System V/386 R4.2	1.0		x86 PC		Link
AT&T System V/386	AT&T System V/386 Release 4.0	2.1		x86 PC	Andrew Warkentin
AT&T Unix PC System V R2	AT&T Unix PC System V R2	3.51m		UNIX PC (7300/3b1)	Arnold David Robbins	Link
Atari DOS	Atari DOS	2.5	Demos 1	Atari 8-bit computers
Atari DOS	Atari DOS	2.5	Demos 2	Atari 8-bit computers
Atari System V	Atari System V	1.0-08 UE12 (Developer Prerelease)		Atari ST/TT/Falcon	Antoni Sawicki (tenox)
AtheOS	AtheOS	0.3.7		x86 PC	Andrew Warkentin
Aton CP/M for TRS-80 Model II	Aton CP/M for TRS-80 Model II	2.23I		TRS-80 Model II/12/16/6000
Aton CP/M for TRS-80 Model II	Aton CP/M for TRS-80 Model II	2.25B		TRS-80 Model II/12/16/6000
Atrax	Atrax	0.09		x86 PC
Avigo OS	Avigo OS	1004		Avigo
B-right/V	Chokanji 4 (B-right/V)	4.104		x86 PC	Andrew Warkentin
B-right/V	Chokanji V (B-right/V)	4.5		x86 PC	Andrew Warkentin
B5x00 MCP	B5x00 MCP	Mark XIII		B5x00 (original Burroughs large systems)	Richard Cornwell	Link
Baker-Quick-DOS	Baker-Quick-DOS (MZ-80K)	2.5		MZ-80K/80C/80A/700/800/1500 family
Barbux	Barbux	1.0.0		x86 PC
Bashkiria-2M (Hacker Club) CP/M	Bashkiria-2M (Hacker Club) CP/M	1.2 (apparently based on 2.2)		Bashkiria-2M
BASIC-16	BASIC-16	Rev. A		Honeywell Series 16
BASIC-M25 (6Z002)	BASIC-M25 (6Z002)	1.0a		MZ-80B/2x00 family
BASIC-M25 (6Z002)	BASIC-M25 (6Z002)	2.0a		MZ-80B/2x00 family
BASIS	BASIS	1.02		BK 0010/BK 0011
BBGDOS	BBGDOS	1.0		Famicom/NES and clones
BD-DOS	BD-DOS	2.2		Oric machines (inc. clones)
BeleniX	BeleniX	0.3 (Solaris 11)		x86 PC	Andrew Warkentin
Bell Interpretive System Sieve of Eratosthenes demo	Bell Interpretive System Sieve of Eratosthenes demo			IBM 650	Roberto Sancho Villa
BeOS	BeOS	3.1		x86 PC	Andrew Warkentin
BeOS	BeOS	4.0		x86 PC	Andrew Warkentin
BeOS	BeOS	4.5		x86 PC	Andrew Warkentin
BeOS	BeOS	5.0.3		x86 PC	Andrew Warkentin
BeOS	BeOS	5.1d0 (Exp/Dano) (beta; abandoned before final release)		x86 PC	Andrew Warkentin
Best Tool Kit (Otladchik)	Best Tool Kit (Otladchik)	various		Agat
BKUNIX	BKUNIX	0.2		BK 0010/BK 0011
BlinkOS	BlinkOS	0.2a		x86 PC
Bluebottle (AOS)	Bluebottle (AOS)	2004-03-12		x86 PC	Andrew Warkentin
BlueIllusion OS	BlueIllusion OS	0.036		x86 PC
Boot Sector OS	Boot Sector OS	0.01a		x86 PC
Borealis	Borealis OS	11		x86 PC
BOS/360	BOS/360			System/360 and compatible	Richard Cornwell, Roberto Sancho Villa	Link
BOW (BSD on Windows)	BOW (BSD on Windows)	1.5		x86 PC	Andrew Warkentin
BSD/OS	BSD/386	1.1		x86 PC
BSD/OS	BSD/OS	4.1		x86 PC	Andrew Warkentin
BugOS	BugOS	2.0		x86 PC
Busicom 141PF firmware	Busicom 141PF firmware			Busicom 4004-based calculators
C64 KERNAL	C64 KERNAL		IDE64	Commodore 64
C64 KERNAL	C64 KERNAL		With C=SOFT OS 2.2	Commodore 64
Caldera OpenLinux	Caldera OpenLinux	1.1 Lite		x86 PC	Andrew Warkentin
Canon Cat OS	Canon Cat OS	1.74		Cat
Canon Cat OS	Canon Cat OS	2.40	Built from recovered source code disks	Cat
Canon Cat OS	Canon Cat OS	2.40	Dumped from ROM of development model	Cat
CAPS-11	CAPS-11	01-02		PDP-11 (Unibus/Qbus-based)	Lou Ernst, malcolm_macleod	Link
CAPS-8	CAPS-8	1.3		PDP-5/PDP-8 family	David Gesswein	Link
Carnegie Internal Translator	Carnegie Internal Translator Sieve of Eratosthenes demo			IBM 650	Roberto Sancho Villa
Casio graphing calculator OS	FC-1000 OS			Casio NM-325/HD62023/μPD1037-based graphing calculators
Casio graphing calculator OS	FX-7500G OS			Casio NM-325/HD62023/μPD1037-based graphing calculators
Casio graphing calculator OS	FX-8000G OS			Casio NM-320/μPD1007-based graphing calculators
Casio x86 pocket computer OSes	FX-890P OS			Casio x86-based pocket computers
Casio x86 pocket computer OSes	Z-1 OS			Casio x86-based pocket computers
Casio x86 pocket computer OSes	Z-1GR OS			Casio x86-based pocket computers
CC-40 BASIC	CC-40 BASIC			CC-40/TI-74
CCOS	CCOS	2.2		Concept
CDC 6000-series SCOPE	NOS/BE	1.5 PSR 712		CDC 6x00/Cyber 70/Cyber 170/Cyber 180		Link
CDOS (Cortex)	CDOS (Cortex)	1.20		ETI/PowerTran Cortex and derivatives
CDOS (Cromemco)	CDOS (Cromemco)	02.58		Cromemco S100 systems	Peter Schorn	Link
CFFA1 Monitor	CFFA1 Monitor	1.1		Apple I
Chippewa OS	Chippewa OS	1.0 beta; November reference (last modification date 1964-12-21)		CDC 6x00/Cyber 70/Cyber 170/Cyber 180
Choices	PC-Choices	5.0		x86 PC	Andrew Warkentin
Cintpos	Cintpos	20060727		Hosted OSes (non-emulated)
Citrix Multiuser	Citrix Multiuser	1.0 (based on MS OS/2 1.21)		x86 PC	Jason Stevens (neozeed)
Citrix Multiuser	Citrix Multiuser	2.0 (based on IBM OS/2 2.0 LA 6H.177)		x86 PC	Jason Stevens (neozeed)
Classic DOS-based Windows	Windows	1.00 Alpha		x86 PC	Andrew Warkentin
Classic DOS-based Windows	Windows	1.00 Beta		x86 PC	Andrew Warkentin
Classic DOS-based Windows	Windows	1.00 DR5		x86 PC	Andrew Warkentin
Classic DOS-based Windows	Windows	1.00 Premiere Edition		x86 PC	Andrew Warkentin
Classic DOS-based Windows	Windows	1.01		x86 PC
Classic DOS-based Windows	Windows	1.04		x86 PC	Andrew Warkentin
Classic DOS-based Windows	Windows	3.0		x86 PC	Andrew Warkentin
Classic DOS-based Windows	Windows	3.0.14 (3.0 Debug Release 1.14)		x86 PC	Andrew Warkentin
Classic DOS-based Windows	Windows	3.0.33 (3.0 Debug Release 1.33)		x86 PC	Andrew Warkentin
Classic DOS-based Windows	Windows	3.0.55 (3.0 Beta 1.55)		x86 PC	Andrew Warkentin
Classic DOS-based Windows	Windows	3.1 (3.1.103; main RTM)		x86 PC	Andrew Warkentin
Classic DOS-based Windows	Windows	3.1.026 beta		x86 PC	Andrew Warkentin
Classic DOS-based Windows	Windows for PC-D	1.02		PC-X/PC-D
Classic DOS-based Windows	Windows for PC-D	2.11		PC-X/PC-D
Classic DOS-based Windows	Windows for Workgroups	3.11 (3.11.300; RTM)		x86 PC	Unknown developer
Classic DOS-based Windows	Windows/386	2.03		x86 PC	Andrew Warkentin
Classic DOS-based Windows	Windows/386	2.11		x86 PC	Andrew Warkentin
CLCD KERNAL	CLCD KERNAL	1985-04-12 (from Bil Herd’s machine)		Commodore LCD
Clicker32	Clicker32	0.9.4		x86 PC
CLIX	CLIX	7.6.20		Intergraph Clipper machines
CLIX	CLIX	7.6.28		Intergraph Clipper machines	Andrew Warkentin
Cnix	Cnix			x86 PC
CODOS	CODOS	2.0		MTU-130/140
Coherent	Coherent	2.3.43		x86 PC	Udo Munk
Coherent	Coherent	3.1.0-DK		x86 PC	Udo Munk
Coherent	Coherent	3.2		x86 PC	Udo Munk
Coherent	Coherent	4.0.74		x86 PC	Udo Munk
Coherent	Coherent	4.2.14		x86 PC	Udo Munk
Compaq MS-DOS	Compaq MS-DOS	3.31	With DeskMate 3.05	x86 PC	Andrew Warkentin
Compaq MS-DOS	Compaq MS-DOS	3.31	With GEM 3.01	x86 PC	Andrew Warkentin
Compaq MS-DOS	Compaq MS-DOS	3.31	With Windows 1.0 Beta	x86 PC	Andrew Warkentin
Compaq MS-DOS	Compaq MS-DOS	3.31	With Windows 1.0 Premiere Edition	x86 PC	Andrew Warkentin
Compaq MS-DOS	Compaq MS-DOS	3.31	With Windows 1.04	x86 PC	Andrew Warkentin
Compaq MS-DOS	Compaq MS-DOS	3.31	With Windows 3.0 beta 1.14	x86 PC	Andrew Warkentin
Compaq MS-DOS	Compaq MS-DOS	3.31	With Windows/386 2.03	x86 PC	Andrew Warkentin
Compaq MS-DOS	Compaq MS-DOS	3.31	With Windows/386 2.11	x86 PC	Andrew Warkentin
Compusense FLEX for Dragon	Compusense FLEX for Dragon	1.2.0		Dragon 32/64/200
Compusense FLEX for Dragon	Compusense FLEX for Dragon	1.3.1		Dragon 32/64/200
Compusense FLEX for Dragon	Compusense FLEX for Dragon	1.3.2		Dragon 32/64/200
Compusense FLEX for Dragon	Compusense FLEX for Dragon	2.0.0		Dragon 32/64/200
COMX 35 BASIC	COMX-35 BASIC	1.02		COMX-35
Concurrent CP/M-86 for Compupro 8/16	Concurrent CP/M-86 for Compupro 8/16	3.1		CompuPro S100 systems	Peter Schorn	Link
Concurrent CP/M-86 for Rainbow	Concurrent CP/M-86 for Rainbow	2.5		Rainbow 100
Concurrent CP/M-86 for RC759	Concurrent CP/M-86 for RC759	2.1		RC75x
Concurrent CP/M-86 for RC759	Concurrent CP/M-86 for RC759	3.1		RC75x
Concurrent DOS for RC759	Concurrent DOS for RC759	4.1		RC75x
Concurrent DOS for RC759	Concurrent DOS for RC759	5.2		RC75x
Contiki	Contiki	1.0		Commodore 64
Contiki	Contiki	1.2		Commodore 64
Contiki	Contiki	1.3		8-bit Apple II series
ContOS	ContOS	20020424a		x86 PC
COS	COS	1.17		Cray PVP machines
COS-310	COS-310	8.0		PDP-5/PDP-8 family
CP-V	CP-V	C00 (CPCP)		Sigma 32-bit series	keith_calkins	Link
CP/A for Z9001	CP/A for Z9001	18.01.89		KC8x/Z9001
CP/M for Acorn Z80 Tube	Acorn CP/M (for Z80 Tube)	2.2		BBC Micro
CP/M for Adam	CP/M for Adam	2.2		Adam/ColecoVision
CP/M for Altair	CP/M for Altair	2.2	Original image from SIMH 3.x ceoaltair.zip	Altair		Link
CP/M for Altair (CP/NOS) (from Peter Schorn)	CP/M for Altair (CP/NOS)	1.2 (based on CP/M 2.2)		Altair		Link
CP/M for Altair (from Peter Schorn)	CP/M for Altair	1.4		Altair		Link
CP/M for Altair (from Peter Schorn)	CP/M for Altair	2.2	CP/M 1.4 development system	Altair		Link
CP/M for Altair (from Peter Schorn)	CP/M for Altair	2.2	CP/NET client	Altair		Link
CP/M for Altair (from Peter Schorn)	CP/M for Altair	2.2	Regular system	Altair		Link
CP/M for Altair (from Peter Schorn)	CP/M for Altair	2.2	With MP/M 2.1, regular system	Altair		Link
CP/M for Altair (from Peter Schorn)	CP/M for Altair	2.2	With MPM 2.2; CP/NET server	Altair		Link
CP/M for Altair (from Peter Schorn)	CP/M for Altair	3.0	Regular system	Altair		Link
CP/M for Altair (from Peter Schorn)	CP/M for Altair, with NZ-COM	2.2; NZ-COM 1.2		Altair		Link
CP/M for Altair (from Peter Schorn)	CP/M for Altair, with Z3PLUS	3.0 (Z3PLUS version 1.02)		Altair		Link
CP/M for Altair (NovaDOS) (from Peter Schorn)	CP/M for Altair (NovaDOS)	2.2		Altair		Link
CP/M for Altair (P2DOS) (from Peter Schorn)	CP/M for Altair (P2DOS)	2.2		Altair		Link
CP/M for Altair (SUPRBDOS) (from Peter Schorn)	CP/M for Altair (SUPRBDOS)	2.2		Altair		Link
CP/M for Aquarius+	CP/M for Aquarius+	2.2 v1.1		Aquarius
CP/M for Aussie Byte II	CP/M for Aussie Byte II	3.1		Aussie Byte II (a.k.a. Knight 2000 Microcomputer)
CP/M for C128	CP/M Plus for C128	3.0		Commodore 128
CP/M for Compupro 8/16	CP/M for Compupro 8/16	2.2NZ	Diagnostics	CompuPro S100 systems	Peter Schorn	Link
CP/M for Compupro 8/16	CP/M for Compupro 8/16	2.2NZ	Regular system	CompuPro S100 systems	Peter Schorn	Link
CP/M for Compupro 8/16	CP/M for Compupro 8/16	2.2NZ-agn		CompuPro S100 systems	Peter Schorn	Link
CP/M for Compupro 8/16	CP/M for Compupro 8/16	2.2Q	Regular system	CompuPro S100 systems	Peter Schorn	Link
CP/M for Compupro 8/16	CP/M Plus for Compupro 8/16	3.2	Banked memory	CompuPro S100 systems	Peter Schorn	Link
CP/M for Compupro 8/16	CP/M Plus for Compupro 8/16	3.2	Non-banked memory	CompuPro S100 systems	Peter Schorn	Link
CP/M for Einstein	CP/M for Einstein	3.0		Einstein
CP/M for Excalibur 64	CP/M for Excalibur 64	2.2		Excalibur 64
CP/M for FM-11	CP/M for FM-11	2.2		FM-7x/8x/11 series
CP/M for Hector	CP/M for Hector	2.2		Interact/Victor Lambda/Hector family
CP/M for IQ-151	CP/M for IQ-151	2.2		IQ-151
CP/M for Juku E5104	CP/M for Juku E5104	2.2		Juku
CP/M for Korvet	CP/M for Korvet	2.2		Korvet/PK 8010/PK 8020
CP/M for MBC-200	CP/M for MBC-200	2.2		MBC-2x0/MBC-12x0
CP/M for Mikrosha	CP/M for Mikrosha	2.2		Mikrosha
CP/M for N8VEM	CP/M for N8VEM	2.2		N8VEM/RetroBrew		Link
CP/M for Nascom	CP/M for Nascom	2.2		Nascom 1/2/3
CP/M for Okean-240	CP/M for Okean-240	2.2		Okean-240
CP/M for P112	CP/M for P112	3.0	With ZP/M 3	P112		Link
CP/M for Partner	CP/M for Partner	3.0		Partner
CP/M for Partner-01	CP/M for Partner-01	2.2		Partner 01.01
CP/M for PC-8801	CP/M for PC-8801mk2	2.2 (CBIOS Rev 3.2)		PC-8001/8801/88VA family
CP/M for PcW16	CP/M for PcW16	2.2		PcW16
CP/M for Proteus	CP/M for Proteus	2.2	Poly terminal	Poly/Proteus
CP/M for Proteus	CP/M for Proteus	2.2	Serial terminal	Poly/Proteus
CP/M for PSI98	CP/M for PSI98	2.2 (6.31-Z)		KDT/PSI
CP/M for RC702	CP/M for RC702	2.2		RC702
CP/M for SMC-70/SMC-777	CP/M for SMC-70/SMC-777	2.2		SMC-70/SMC-777
CP/M for SOL with NorthStar disk controller	CP/M for SOL with NorthStar disk controller	2.2		SOL-10/20/PC	Jim Battle	Link
CP/M for Sorcerer	CP/M for Sorcerer	1.42/3	Set 1	Sorcerer
CP/M for Sorcerer	CP/M for Sorcerer	1.42/3	Set 2	Sorcerer
CP/M for Spectrum Next	CP/M for Spectrum Next	3.0		Sinclair ZX Spectrum and 100% clones
CP/M for Super 80	CP/M for Super 80	2.2		Super 80
CP/M for Vector Graphic	CP/M for Vector Graphic	2.2H (56K)		Vector Graphic S-100 systems	Peter Schorn	Link
CP/M for X1	CP/M for X1	2.2		X1
CP/M for Z1013	CP/M for Z1013	2.2		MRB Z1013
CP/M-68K for Sage	CP/M-68K for Sage	1.2		Sage/Stride systems
CP/M-86 for Compupro 8/16	CP/M-86 for Compupro 8/16	1.1PB		CompuPro S100 systems	Peter Schorn	Link
CP/M-86 for MZ-6000	CP/M-86 for MZ-6550 (2Z-030A)	1.1a		MZ-5500/MZ-6500 family
CP/M-86 for PC	CP/M-86	1.1 (PC)	AT - 1.4M floppy	x86 PC
CP/M-86/80	CP/M-86/80	2.00		Rainbow 100
CP/M-86/80	CP/M-86/80	2.10		Rainbow 100
CPM-8000 for M20	CPM-8000 for M20	1.1		M20
CROMIX	CROMIX	11.27		Cromemco S100 systems
CROMIX-PLUS	CROMIX-PLUS	162		Cromemco S100 systems		Link
CROOK 5	CROOK 5	8/13		K-202/MERA 400/MX-16		Link
CROOK 5	CROOK 5	8/15		K-202/MERA 400/MX-16		Link
Crystal Research CP/M for MZ-80K	Crystal Research CP/M for MZ-80K	2.23		MZ-80K/80C/80A/700/800/1500 family
CS-DOS	CS-DOS	1.50		Commodore 128
CSIDOS	CSIDOS	3.30		BK 0010/BK 0011
CSIDOS	CSIDOS	3.32		BK 0010/BK 0011
CSIRAC software collection	CSIRAC software collection			CSIRAC
CTOS	CTOS III	s1.3.5		x86 PC
CTSS	CTSS	MIT8C0		IBM 704x/709x
CUBIX	CUBIX	1.5		D6809	Dave Dunfield	Link
CyOS	CyOS	1.3.58		Cybiko
CyOS	CyOS	1.5.08		Cybiko
D&Z EOS	D&Z/softeam EOS	3 (1984-03-15)		MZ-3500	ajfa
Darwin	Darwin	0.3		Macintosh (PowerPC-based)
Darwin	Darwin	1.0		Macintosh (PowerPC-based)
Datapoint CTOS	Datapoint CTOS	3.2		Datapoint 2200 family
Datapoint DOS	Datapoint DOS.C	2.		Datapoint 2200 family
Dave Pitts TI-990 Research Unix	Dave Pitts TI-990 Research Unix	6th Edition (1.0.3)		TI 990		Link
dB-BASIC	dB-BASIC	1.0/1.2		X1
DCP	DCP	3.2		x86 PC
DCP	DCP	3.3		x86 PC
DDT for PDP-1	DDT for PDP-1			PDP-1
DeadCD	DeadCD	0.4		x86 PC	Andrew Warkentin
Debian GNU/Hurd	Debian GNU/Hurd	J2		x86 PC	Andrew Warkentin
Debian GNU/Hurd	Debian GNU/Hurd	K10		x86 PC	Andrew Warkentin
Debian GNU/Hurd	Debian GNU/Hurd	K7		x86 PC	Andrew Warkentin
Debian GNU/Hurd	Debian GNU/Hurd	Unstable 20221029		x86 PC	Andrew Warkentin
Debian GNU/kFreeBSD	Ging (Debian GNU/kFreeBSD Live CD)	0.1.0		x86 PC
Debian GNU/Linux	Debian GNU/Linux	0.91		x86 PC	Andrew Warkentin
Debian GNU/Linux	Debian GNU/Linux	2.2r5		x86 PC	Andrew Warkentin
Debian GNU/Linux	Debian GNU/Linux	3.0		x86 PC	Andrew Warkentin
Debian GNU/Linux	Debian GNU/Linux	3.1	MIPS installer	QEMU paravirtualized MIPS SBC
Debian GNU/MiNT	Debian GNU/MiNT	3.0		Atari ST/TT/Falcon	Andrew Warkentin
DEC OSF/1	DEC OSF/1 for MIPS	1.0 Silver		DEC MIPS machines (DECstation/DECsystem)	Andrew Warkentin
DEC OSF/1	DEC OSF/1 for MIPS	1.0 Tin		DEC MIPS machines (DECstation/DECsystem)	Andrew Warkentin
DEC OSF/1	DEC OSF/1 for MIPS	2.0		DEC MIPS machines (DECstation/DECsystem)	Andrew Warkentin
DEC OSF/1	Tru64 UNIX	5.1B		DEC Alpha machines
DECsys-7	DECsys-7			PDP-4, PDP-7		Link
Dell System V/386	Dell System V/386 Release 4.0	2.2		x86 PC	Antoni Sawicki (tenox)
DEMOS	DEMOS	3.0		PDP-11 (Unibus/Qbus-based)	Sergei Vakulenko
Desert Spring-Time	Desert Spring-Time	2005-05-29		x86 PC
DEX	DEX	1.00SP		x86 PC
Dex4u	Dex4u	2005-12-06		x86 PC
DG Nova DOS (original)	DG Nova DOS (original)	5		Nova	Bruce Ray	Link
DG/RDOS	DG/RDOS	3.00		Eclipse	Bruce Ray	Link
DG/UX	DG/UX	5.4 R4.20MU07		x86 PC	Andrew Warkentin
DIP DOS	DIP DOS	2.11		Portfolio
DISPAK	DISPAK	117		BESM-6		Link
DLX Linux	DLX Linux	1.0		x86 PC
DMF-80/ST	DMF-80/ST	1.0		Altair		Link
DNOS	DNOS	1.2.1		TI 990	Dave Pitts	Link
DNOS	DNOS	1.3.0		TI 990	Dave Pitts	Link
DOCS	DOCS	01/79		TI 990	Dave Pitts	Link
DOM (P856)	DOM (P856)	05		P856	Theo Engel	Link
Domain/OS	Domain/OS	SR10.4		Apollo/DOMAIN (68k-based)	Andrew Warkentin
Domain/OS	Domain/OS	SR10.4.1		Apollo/DOMAIN (68k-based)	Andrew Warkentin
DOMUS	DOMUS	3.03		RC 7000/3600		Link
DOS MX	DOS MX	3.6		Specialist MX
DOS+ for Altair (from Peter Schorn)	DOS+ for Altair (from Peter Schorn)	2.5		Altair		Link
DOS-15	DOS-15	2A		PDP-15, PDP-9		Link
DOS-15	XVM/DOS	1A		PDP-15		Link
DOS/360 and successors	DOS/360	R26.2		System/360 and compatible	Roberto Sancho Villa	Link
DOS/65	DOS/65	2.15		Commodore 64
DOS/BATCH-11	DOS/BATCH-11	10-01a		PDP-11 (Unibus/Qbus-based)		Link
DOS/VS	DOS/VS	R34	5-pack, for VM/370	System/360 and compatible		Link
DOS/VS	DOS/VS	R34	Minimal system	System/360 and compatible
DOS80	DOS80	1.0		Einstein
DOSPLUS	DOSPLUS	3.50		TRS-80 Model I/III/4	Ian Mavric	Link
DP-II	DP-II	A.01		TRS-80 Model II/12/16/6000
dr’ex	dr’ex	0.0.2		x86 PC
DR-DOS	DR-DOS	6.0	Hard drive; with GeoWorks Pro 1.2.8	x86 PC	Andrew Warkentin
DR-DOS	DR-DOS	7.02		x86 PC	Andrew Warkentin
DR-DOS	DR-DOS	7.03	Hard drive; with GeoWorks 2.0 and GEM/XM	x86 PC	Andrew Warkentin
DR-DOS	Novell DOS	7.0	With GeoWorks Ensemble 2.0	x86 PC	Andrew Warkentin
Dragon BASIC	Dragon BASIC (Dragon 64)	1.0		Dragon 32/64/200
Dragon BASIC	Dragon BASIC (Dragon Alpha)	1.0		Dragon Professional/Alpha
DragonFly BSD	DragonFly BSD	1.1-CURRENT		x86 PC	Andrew Warkentin
DRI DOS Plus for BBC Master 512	DRI DOS Plus for BBC Master 512	1.2		BBC Micro
DROPS	DROPS	2004-04-19		x86 PC	Andrew Warkentin
DSDOS	DSDOS	3.95		Orion
DSM-11	DSM-11	3.3		PDP-11 (Unibus/Qbus-based)
DTSS for GE-235	DTSS for GE-235	Phase IV (1965-08-26)		GE 200 series		Link
DX-DOS	DX-DOS	1.0		BK 0010/BK 0011
DX10	DX10	3.2.3		TI 990	Dave Pitts	Link
DX10	DX10	3.3.0		TI 990	Dave Pitts	Link
DX10	DX10	3.6.0		TI 990	Dave Pitts	Link
DX10	DX10	3.7.0		TI 990	Dave Pitts	Link
E/OS LX	E/OS LX	0.2.5		x86 PC	Andrew Warkentin
EBS 1200/1600 OPUS	EBS 1231 OPUS			EBS 1200/1600
Eclipse OS	Eclipse OS	0.2-3		x86 PC
eComStation	eComStation	1.2 (based on IBM 4.50)	Demo CD	x86 PC
eCos	eCos		Scivoli (slideshow demo)	x86 PC
EDOS	EDOS	1.40		Einstein
EDSAC software collection	EDSAC software collection			EDSAC
EDX	EDX	6.1		Series/1
Einstein booter games collection	Einstein booter games collection			Einstein
Elate (a.k.a. Intent/TAOS)	Elate (a.k.a. Intent/TAOS)	1.2		Hosted OSes (non-emulated)
Elf standalone software collection	Elf standalone software collection			COSMAC ELF
Elf/OS	Elf/OS	0.2.2		COSMAC ELF
Elf/OS	Elf/OS	0.2.3		COSMAC ELF
Elf/OS	Elf/OS	0.2.4		COSMAC ELF
Elf/OS	Elf/OS	0.2.5		COSMAC ELF
Elf/OS	Elf/OS	0.2.6		COSMAC ELF
Elf/OS	Elf/OS	0.2.8	Elf 2000	COSMAC ELF
Elf/OS	Elf/OS	0.2.8	Elf II	COSMAC ELF
ELKS	ELKS	0.1.0		x86 PC
Elliott 903 ALGOL software	Elliott 903 ALGOL software			Elliott 900
EmuTOS	EmuTOS	2006-02-20		Atari ST/TT/Falcon	Andrew Warkentin
EOS	EOS	6		Adam/ColecoVision
EOTA	EOTA	4		x86 PC
EPOC16	EPOC16 (Psion Debugger)	3.95F (ROM 2.20E)		SIBO devices	Andrew Warkentin
EPOC16	EPOC16 for Series 3	2.36F (ROM 1.00E)	DOS-hosted emulator build	SIBO devices	Andrew Warkentin
EPOC16	EPOC16 for Series 3a	3.22F (ROM 3.25F)	DOS-hosted emulator build	SIBO devices	Andrew Warkentin
EPOC16	EPOC16 for Series 3c	3.22F (ROM 5.20F)	DOS-hosted emulator build	SIBO devices	Andrew Warkentin
EPOC16	EPOC16 for Siena	3.22F (ROM 4.21A)	DOS-hosted emulator build	SIBO devices	Andrew Warkentin
EPOC16	EPOC16 for Workabout	3.22F (ROM 2.00F)	DOS-hosted emulator build	SIBO devices	Andrew Warkentin
EPOC32/Symbian OS	EPOC32	Release 5 (1.05)		EPOC32/Symbian devices
Escape	Escape	0.3		x86 PC
ESI-X	ESI-X			PDP-5/PDP-8 family
ESIX System V/386	ESIX System V/386 Release 3.2	Revision C		x86 PC	Antoni Sawicki (tenox)
ETOS	ETOS	5B		PDP-5/PDP-8 family	David Gesswein
Eurocom II FLEX	Eurocom II FLEX	9.1		Eurocom II
Excelsior	Excelsior	1.31		Kronos
Exclaim	Exclaim	0.2.1		x86 PC
EXELDOS	EXELDOS	1.4		EXL100
EXL100 tape/cartridge software collection	EXL100 tape/cartridge software collection			EXL100
EXOS	EXOS	2.4		Enterprise 64/128		Link
F-BASIC	F-BASIC	5.0		FM-7x/8x/11 series
FENIX	FENIX	0.2		MZ-80B/2x00 family
FIG-Forth	FIG-FORTH for Altair	1.10		Altair		Link
FIG-Forth	fig-FORTH for NABU	1.3		NABU Personal Computer
FIG-Forth	FIG-Forth for TI-990	1.0.0		TI 990	Dave Pitts	Link
FIG-Forth	UKNC Real-Time Stand-Alone FIG-Forth	2.0		UKNC (MS 0511)
Fiwix	Fiwix	0.1.5		x86 PC	Andrew Warkentin
FLEX for Proteus	FLEX for Proteus	2.8:3		Poly/Proteus
FLEX for SWTPC 6800	FLEX for SWTPC 6800	2.1		SWTPC 6800	Michael Evenson	Link
FLEX for SWTPC 6809	FLEX for SWTPC 6809	2.9.2		SWTPC 6809	Michael Evenson	Link
FMG CP/M for TRS-80 Model II	FMG CP/M for TRS-80 Model II	2.21		TRS-80 Model II/12/16/6000
FMI/OS	FMI/OS	2005-07-21		x86 PC
FOCAL-15 (paper tape)	FOCAL-15 (paper tape)	6B		PDP-15		Link
FOCAL/990	FOCAL/990			TI 990	Dave Pitts	Link
FOCAL69	FOCAL69			PDP-5/PDP-8 family
FODOS for UKNC	FODOS for UKNC	3.0		UKNC (MS 0511)
FOR TRANSIT	FOR TRANSIT graph demo			IBM 650	Roberto Sancho Villa
FOR TRANSIT	FOR TRANSIT Sieve of Eratosthenes demo			IBM 650	Roberto Sancho Villa
Forth OS Plus	Forth OS Plus	2.0		Dragon 32/64/200
FORTH980	FORTH980	1.0.1		TI 980
ForthOS	ForthOS	1.0		x86 PC
Foton IK-02 games collection	Foton IK-02 games collection			Foton-IK02
fox32os	fox32os	0.4 (Git commit 36b714390d54)		fox32
FP-200 OS	FP-200 OS	1.0		FP-200
FreeBSD	FreeBSD	1.0		x86 PC	Andrew Warkentin
FreeBSD	FreeBSD	4.7		x86 PC	Andrew Warkentin
FreeDOS	FreeDOS	1.1.17	Floppy	x86 PC
FreeDOS	FreeDOS	1.1.17	Hard drive (QEMU demo image)	x86 PC
FreeDOS	FreeDOS	1.1.26a	w/muLinux; minimal install	x86 PC
FreeDOS	FreeDOS	1.1.34	Hard drive (w/OpenGEM)	x86 PC	Andrew Warkentin
FreeDOS	FreeDOS	1.1.35w	Hard drive (protected mode tutorials)	x86 PC
FreeDOS	FreeDOS	1.3	Hard drive (w/open source Breadbox Ensemble 4.1.4)	x86 PC	Andrew Warkentin, N2KMaster	Link
FreeDOS 32	FreeDOS 32	0.0.3 beta		x86 PC
FreeNOS	FreeNOS	0.0.4		x86 PC
FreeVMS	FreeVMS	0.0		x86 PC	Andrew Warkentin
FSD-Amoeba	FSD-Amoeba	2002-A		x86 PC	Andrew Warkentin
Fuzix	Fuzix	0.3		MTX500/MTX512/RS128	Dave Stevenson	Link
GEMDOS for Lisa	GEMDOS for Lisa	1.1		Lisa
Genode	Genode (Demos)	2009.09		x86 PC
Genode (Sculpt)	Genode (Sculpt)	25.04		x86 PC	Andrew Warkentin
GEORGE 3/4	GEORGE 3	8.67	Bare metal (EM1900)	FP 6000/ICL 1900
GEORGE 3/4	GEORGE 3	8.67	High-level emulator (G3EE)	FP 6000/ICL 1900
GEOS	GEOS for C128	1.0		Commodore 128
GEOS	GEOS for C64	2.1		Commodore 64
GEOS	GEOS for the Apple 2	2.1		Apple IIgs
GeoWorks/Ensemble	Breadbox Ensemble	4.1.3		x86 PC	Andrew Warkentin
GeoWorks/Ensemble	Breadbox Ensemble	4.1.4-20231126		x86 PC	Andrew Warkentin
GeoWorks/Ensemble	GeoWorks Ensemble	2.0		x86 PC	Andrew Warkentin
GeoWorks/Ensemble	GeoWorks Pro	1.2.8		x86 PC	Andrew Warkentin
GeoWorks/Ensemble	NewDeal Office	3.2a		x86 PC	Andrew Warkentin
GeoWorks/Ensemble	NewDeal Office 2000	4.0		x86 PC	Unknown developer
GNO/ME	GNO/ME	2.0.6		Apple IIgs	Andrew Warkentin
GRiD-OS	GRiD-OS (InteGRID)	3.3.1		x86 PC	Thomas Cherryhomes	Link
GS/OS	GS/OS	4.0	Master	Apple IIgs
GS/OS	GS/OS	4.0	New IIgs Tour	Apple IIgs
GS/OS	GS/OS	5.0.4		Apple IIgs
GS/OS	GS/OS	6.0.1		Apple IIgs
H8 cassette software collection	H8 cassette software collection			H8/H88/H89
Haiku	Haiku	0.1 pre-alpha (date unknown)		x86 PC
Haiku	Haiku	R1 Alpha 1		x86 PC	Andrew Warkentin
Haiku	Haiku	R1 Beta 4		x86 PC	Andrew Warkentin
Haiku	Haiku	R1 Pre-Alpha		x86 PC	Andrew Warkentin
HamsterOS	HamsterOS	0.3		x86 PC
HanaOS	HanaOS	Final		x86 PC
HanoiOS	HanoiOS			x86 PC
HariboteOS	HariboteOS	2.7		x86 PC
HC DOS	HC DOS	2.2		BK 0010/BK 0011
HDOS	HDOS	1.5		H8/H88/H89
HDOS	HDOS	1.6		H8/H88/H89
HDOS	HDOS	2.0		H8/H88/H89
HDOS	HDOS	3.02		H8/H88/H89
Heath CP/M	Heath/Zenith CP/M	2.2x03		H8/H88/H89
Hector tape software collection	Hector tape software collection			Interact/Victor Lambda/Hector family
HelenOS	HelenOS	0.2.0		x86 PC
HelenOS	HelenOS	0.4.0		x86 PC
HELP-3	HELP-3			GIER		Link
Hitachi Level-3 BASIC	Hitachi Level-3 BASIC	1.0		Basic Master Level 3
HJÆLP 1	HJÆLP 1			GIER		Link
Honeywell Series 16 punch tape software collection	Honeywell Series 16 paper tape software collection			Honeywell Series 16
hOp/House	hOp/House	2004-09-24		x86 PC
HP 2000/ACCESS Time-Shared BASIC	HP 2000/ACCESS Time-Shared BASIC	1812		HP 21xx/1000/2000	J. David Bryan	Link
HP 2000/ACCESS Time-Shared BASIC	HP 2000/ACCESS Time-Shared BASIC	1812	Full system, with applications and user accounts/data	HP 21xx/1000/2000
HP 2000A Time-Shared BASIC	HP 2000A Time-Shared BASIC	20596f		HP 21xx/1000/2000	J. David Bryan	Link
HP 2000E Time-Shared BASIC	HP 2000E Time-Shared BASIC	1534		HP 21xx/1000/2000	J. David Bryan	Link
HP 2000F TSB	HP 2000F TSB	1410		HP 21xx/1000/2000	J. David Bryan	Link
HP 21xx Plotter Diagnostics	HP 21xx Plotter Diagnostics			HP 21xx/1000/2000
HP 21xx Punch-Tape BASIC	HP 21xx Paper-Tape BASIC	20392 Rev B		HP 21xx/1000/2000		Link
HP 21xx Scope Test	HP 21xx Scope Test Pattern Generator			HP 21xx/1000/2000
HP 21xx Scope Test	HP 21xx Storage Scope Test Pattern Generator			HP 21xx/1000/2000
HP 21xx TV Interface Diagnostics	HP 21xx TV Diagnostics			HP 21xx/1000/2000
HP 41 OS	HP 41CX OS			HP 41 series
HP 48 OS	HP-38G OS			HP 38/48/49 series
HP 48 OS	HP-39G OS			HP 38/48/49 series
HP 48 OS	HP-48GX OS			HP 38/48/49 series
HP 48 OS	HP-48SX OS			HP 38/48/49 series
HP 48 OS	HP-49GX OS			HP 38/48/49 series
HP 64000 OS	HP 64000 OS	2.11		HP 64000 Logic Development System
HP 71 BASIC	HP 71B BASIC			HP 71
HP 75 BASIC	HP 75D BASIC			HP 75
HP 9810 OS	HP 9810A OS (V1)	1		HP 98x0
HP 9810 OS	HP 9810A OS (V2)	2		HP 98x0
HP 9820A OS	HP 9820A HPL			HP 98x0
HP 9820A OS	HP 9821A HPL			HP 98x0
HP 9830A BASIC	HP 9830A BASIC			HP 98x0
HP 9830A BASIC	HP 9830B BASIC			HP 98x0
HP 9831 BASIC	HP 9831 BASIC			HP 9825 and derivatives
HP Basic Control System	BCS	IOC 24173 Revision A	HP Chess	HP 21xx/1000/2000	Roberto Sancho Villa
HP Basic Control System	BCS	IOC 24173 Revision A	Scope demo	HP 21xx/1000/2000	Roberto Sancho Villa
HP BASIC/WS	HP BASIC/WS	5.1		HP 9000 Series 200
HP DOS	HP DOS (“DOS-I”)	20597-60001C		HP 21xx/1000/2000	Roberto Sancho Villa
HP DOS	HP DOS-III	1610		HP 21xx/1000/2000	J. David Bryan, Roberto Sancho Villa
HP DOS	HP DOS-M	Product #24225 Rev F		HP 21xx/1000/2000	Roberto Sancho Villa	Link
HP MTS (Magnetic Tape System)	HP MTS (Magnetic Tape System)	20595B		HP 21xx/1000/2000	Roberto Sancho Villa
HP Pascal	HP Pascal	3.25		HP 9000 Series 200
HP-8x BASIC	HP-85B BASIC			HP Series 80
HP-8x BASIC	HP-87 BASIC			HP Series 80
HP-IPL/OS	HP-IPL/OS	1.52a		HP 21xx/1000/2000
HP-UX	HP-UX	10.20		HP 9000 (PA-RISC-based)	Antoni Sawicki (tenox)
HP-UX	HP-UX	11i v1 (B.11.11)		HP 9000 (PA-RISC-based)	Antoni Sawicki (tenox)
HP-UX	HP-UX	9.10		HP 9000 Series 300	Andrew Warkentin
HP-UX/RO	HP-UX/RO	5.0		Integral PC (9807A a.k.a. Model 207)	Andrew Warkentin
Human68K	Human68K	1.01		X68000 family	Andrew Warkentin
Human68K	Human68K	2.01		X68000 family	Andrew Warkentin
Human68K	Human68K	3.02		X68000 family	Andrew Warkentin, Caius, Eidis	Link
Hurd/L4	Gnuppix (Hurd/L4)	2005-03-01		x86 PC
IAS	IAS	3.0		PDP-11 (Unibus/Qbus-based)
IBM 1130 DMS	IBM 1130 DMS	V2M12		IBM 1130		Link
IBM 1410 OS (PR155)	IBM 1410 OS (PR155)	?		IBM 1410/7010	Jay Jaeger, Richard Cornwell
IBM 1410 POS (PR108)	IBM 1410 POS (PR108)			IBM 1410/7010	Richard Cornwell
IBM 5100-series OS	IBM 5110 OS			IBM 5100 series
IBM 650 software collection	Run all IBM 650 software in collection			IBM 650	Roberto Sancho Villa
IBM 650 Sort (tape and RAMAC)	IBM 650 Sort (tape and RAMAC)			IBM 650	Roberto Sancho Villa
IBM 650 Sort (tape and RAMAC)	IBM 650 Sort (tape only)			IBM 650	Roberto Sancho Villa
IBM 701 software collection	Run all IBM 701 software in collection			IBM 701	Roberto Sancho Villa
IBM OS/2	IBM OS/2	1.0 Extended		x86 PC	Andrew Warkentin
IBM OS/2	IBM OS/2	2.0		x86 PC	Andrew Warkentin
IBM OS/2	IBM OS/2	2.0 Beta 6.123		x86 PC	Andrew Warkentin
IBM OS/2	IBM OS/2	2.0 beta 6.605		x86 PC	Andrew Warkentin
IBM OS/2	IBM OS/2	2.0 Beta 6F.167		x86 PC	Andrew Warkentin
IBM OS/2	IBM OS/2	2.0 Limited Availability pre-release (6H.177)		x86 PC	Andrew Warkentin
IBM OS/2	IBM OS/2	2.1		x86 PC	Andrew Warkentin
IBM OS/2	IBM OS/2	3.0 Connect		x86 PC	Andrew Warkentin
IBM OS/2	IBM OS/2	4.0		x86 PC	Andrew Warkentin
IBM OS/2	IBM OS/2 (“CP-DOS”/”286-DOS”/”ADOS”/”DOS 5”)	1.0 Alpha 7.68		x86 PC	Andrew Warkentin
IBM OS/2	IBM OS/2 (“CP-DOS”/”286-DOS”/”ADOS”/”DOS 5”)	1.0 Alpha 7.68.18 (SIZZLE)		x86 PC	Andrew Warkentin
IBM OS/2	IBM OS/2 (Extended Edition)	1.1		x86 PC	Andrew Warkentin
IBM OS/2	IBM OS/2 (Extended Edition)	1.2		x86 PC	Andrew Warkentin
IBM PC Xenix System III	IBM PC Xenix	1.00		x86 PC	Andrew Warkentin
IBM PC Xenix System V	IBM PC Xenix	2.00		x86 PC	Andrew Warkentin
IBSYS (709x)	IBSYS (709x)	V13-19		IBM 704x/709x	Andrew Warkentin, Richard Cornwell, Roberto Sancho Villa
IDOS	IDOS	2.0		PC-8001/8801/88VA family
Idris	CoIdris	2.37		x86 PC	Hans-Ake Lund	Link
Idris	Idris-ST	3.15a		Atari ST/TT/Falcon		Link
IMDOS	IMDOS	2.05		IMSAI 8080	Peter Schorn	Link
Imlac PDS software collection	Imlac PDS Clock			Imlac PDS-1/PDS-4
Imlac PDS software collection	Imlac PDS software collection			Imlac PDS-1/PDS-4
Imlac PDS software collection	Imlac PDS Wumpus			Imlac PDS-1/PDS-4
Inferno	Inferno	Fourth Edition (20100115)		Hosted OSes (non-emulated)
Intel System V/386	Intel System V/386 Release 4.0	2.0		x86 PC	Antoni Sawicki (tenox)
Interact Home Computer software collection	Interact Home Computer software collection			Interact/Victor Lambda/Hector family
Interactive System V/386	Interactive System V/386 Release 3.2	2.2		x86 PC	Andrew Warkentin
Interactive System V/386	Interactive System V/386 Release 3.2	3.0		x86 PC	Antoni Sawicki (tenox)
Interactive System V/386	Interactive System V/386 Release 3.2	4.1		x86 PC	Antoni Sawicki (tenox)
Interlisp (Medley)	Interlisp (Medley)	231103 (328d3f53)		D-machine family
Interpretive FDS demo	Interpretive FDS demo			IBM 650	Roberto Sancho Villa
iOS	iPhone OS (iPod Touch 1G; n45ap)	1.1 (3A101a)		iPhone/iPod touch/iPad
IQ-151 AMOS	AMOS (IQ-151)	4.1		IQ-151
IQ151 Basic	IQ151 Basic	6		IQ-151
IQ151 Basic	IQ151 Basic	g		IQ-151
IRIMS MicroDOS	IRIMS MicroDOS for KC85	2.6		KC8x/Z9001
IRIMS MicroDOS	IRIMS MicroDOS for Vector-06c	3.1		Vector-06c
IRIMS MicroDOS	IRIMS MicroDOS for Vector-06c	3.2		Vector-06c
IRIS	IRIS	7.5		Nova	David Takle	Link
IRIX	IRIX	5.3+XFS		SGI MIPS machines	Andrew Warkentin
IRIX	IRIX	6.5.22m		SGI MIPS machines	Andrew Warkentin, SuperIrix from IrixNet	Link
iRMX 86	iRMX 86	6.0		Intel x86-based iSBC systems
Ishkur CP/M	Ishkur CP/M	2.2 Alpha		NABU Personal Computer
ISIS-II	ISIS-II	4.3		8080-based Intellec (aka iMDS) machines
ITS	ITS	1651		PDP-6/PDP-10 family		Link
JariOS	JariOS	0.0.1a		x86 PC
JaysOS	JaysOS	0.2.1		Game Boy Advance
JNode	JNode	0.1.5		x86 PC
Jodan-DOS	Jodan-DOS for X1	1.0		X1
JR-HuBASIC	JR-HuBASIC	2.0		JR-800
JTMOS	JTMOS	1.0.5035		x86 PC
Jupiter Ace FORTH	Jupiter Ace FORTH			Jupiter Ace
JX	JX	2002-07-21	Small AWT demo	x86 PC
JX	JX	2002-08-02	AWT demo	x86 PC
K-OS One	K-OS One			Hawthorne TinyGiant 68K
KANRININ/3	KANRININ/3	1.05h		X1
KC-CAOS	KC-CAOS	4.4		KC8x/Z9001
Kid Operating System	Kid Operating System	2005-05-17		x86 PC
KO-WINDOW	Ko-Window	2.24+14		X68000 family
Koei game DOS	Koei DOS games collection	3.10		MZ-80B/2x00 family
KolibriOS	KolibriOS	0.5.1.0		x86 PC
KOS	KOS	6.05		KDT/PSI
KRONOS	KRONOS	2.1		CDC 6x00/Cyber 70/Cyber 170/Cyber 180		Link
Kyotronic 85-family OS	Kyotronic KC-85 OS			Kyotronic 85 family
Kyotronic 85-family OS	NEC PC-8201 OS			Kyotronic 85 family
Kyotronic 85-family OS	NEC PC-8300 OS			Kyotronic 85 family
Kyotronic 85-family OS	Olivetti M10 OS			Kyotronic 85 family
Kyotronic 85-family OS	Tandy 200 OS			Kyotronic 85 family
Kyotronic 85-family OS	Tandy TRS-80 Model 100 OS			Kyotronic 85 family
Kyotronic 85-family OS	Tandy TRS-80 Model 102 OS			Kyotronic 85 family
L3	L3FREI	03.15.0 (kernel build 31688)		x86 PC	Andrew Warkentin
L4/Pistachio demo (pingpong)	L4/Pistachio demo (pingpong)			x86 PC
L4Minix-E	L4Minix-E	0.1		x86 PC	Andrew Warkentin
L4Minix-S	L4Minix-S	2.0.2		x86 PC
LDOS/LS-DOS	LDOS	5.3.1		TRS-80 Model I/III/4	Ian Mavric	Link
LEC Personal CP/M for MZ-800	LEC Personal CP/M for MZ-800	1.3		MZ-80K/80C/80A/700/800/1500 family
LEC Personal CP/M for MZ-800	LEC Personal CP/M for MZ-800	1.4		MZ-80K/80C/80A/700/800/1500 family
LEC Personal CP/M for MZ-800	LEC Personal CP/M for MZ-800	2.3		MZ-80K/80C/80A/700/800/1500 family
LEC Personal CP/M for MZ-800	LEC Personal CP/M for MZ-800	4.1		MZ-80K/80C/80A/700/800/1500 family
LEO III Master Program	LEO III Master Program	00401		LEO III
LGP-30 Blackjack	LGP-30 Blackjack			LGP-30/LGP-21
LGP-30 software collection	LGP-30 software collection			LGP-30/LGP-21
Lifeboat Associates CP/M for TRS-80 Model II	Lifeboat Associates CP/M for TRS-80 Model II	2.24-a		TRS-80 Model II/12/16/6000
Lifeboat Associates CP/M for TRS-80 Model II	Lifeboat Associates CP/M for TRS-80 Model II	2.25-d		TRS-80 Model II/12/16/6000
Lifeboat CP/M for Vector Graphic MZ	Lifeboat CP/M for Vector Graphic	1.411		Vector Graphic S-100 systems	Peter Schorn	Link
LindowsOS/Linspire	LindowsOS	2.1.40		x86 PC	Andrew Warkentin
Linux (boot/root)	Linux (boot/root)	0.01-3.3		x86 PC
Linux (boot/root)	Linux (boot/root)	0.11	Boot floppy (ramdisk kernel)	x86 PC	Jiong Zhao	Link
Linux (boot/root)	Linux (boot/root)	0.11	Hard drive	x86 PC	Jiong Zhao	Link
Linux 0.0 replica	Linux	0.0 (replica)		x86 PC
Linux QEMU PPC demo	Linux QEMU PPC demo			PReP-compatible machines
Linux QEMU PPC demo	Linux/ARM QEMU demo	2.6.14		Intergrator/CP
Linux QEMU PPC demo	Linux/SPARC QEMU demo			SPARC machines (Sun-4)
Linux QEMU PPC demo	QEMU Linux SuperH Demo			R2D Plus
Lisa Monitor	Lisa Monitor	12.3		Lisa
LisaOS	LisaOS	2.0		Lisa	Andrew Warkentin
LisaOS	LisaOS	3.1		Lisa	Andrew Warkentin
Lisp for PDP-1	Lisp for PDP-1			PDP-1
LK-SHELL	LK-SHELL	4.58		Orion
LMI ZetaLisp System	Bogodyne/LMI ZetaLisp System	500.0 R1.0		LMI Lisp Machines		Link
LNG	LNG	0.20		Commodore 128, Commodore 64
LNG	LNG	0.21		Commodore 64
LocoScript for PCW	LocoScript	1.0		PCW
LocoScript for PCW	LocoScript	1.50		PCW
LOS-96	LOS-96	1.6		PET/CBM series
LP49	LP49	2009-11-11		x86 PC
LS-DOS	LS-DOS for Model 4	6.3.1		TRS-80 Model I/III/4	Ian Mavric	Link
LS-DOS	LS-DOS for Model II	6.2.0		TRS-80 Model II/12/16/6000
LS-DOS	LS-DOS for Model II	6.3.1		TRS-80 Model II/12/16/6000
LSE/OS	LSE/OS	2004-12-08		x86 PC
LSX	LSX			PDP-11 (Unibus/Qbus-based)	Leonid Broukhis	Link
LSX for UKNC	LSX for UKNC			UKNC (MS 0511)
Lunar Lander	Lunar Lander			PDP-11 (Unibus/Qbus-based)
LUnix	LUnix	0.1p4		Commodore 64
LynxOS	LynxOS	3.0.0		x86 PC	Andrew Warkentin
LynxOS	LynxOS	4.0.0 (Evaluation)		x86 PC	Andrew Warkentin
Mac OS (Classic)	Mac OS	7.6.1		Macintosh (PowerPC-based)		Link
Mac OS (Classic)	Mac OS	8.0		Macintosh (PowerPC-based)		Link
Mac OS (Classic)	Mac OS	8.0 beta (7.7a3c1)		Macintosh (PowerPC-based)	Andrew Warkentin
Mac OS (Classic)	Mac OS	8.1		Macintosh (PowerPC-based)		Link
Mac OS (Classic)	Mac OS	8.5		Macintosh (PowerPC-based)		Link
Mac OS (Classic)	Mac OS	8.6		Macintosh (PowerPC-based)		Link
Mac OS (Classic)	Mac OS	9.0.4		Macintosh (PowerPC-based)		Link
Mac OS (Classic)	Mac OS	9.1		Macintosh (PowerPC-based)
Mac OS (Classic)	Mac OS	9.2.1		Macintosh (PowerPC-based)		Link
Mac OS (Classic)	Mac OS (Classic)	1.0 alpha; Sony Test (Mac16D0 System “6.9”, Flounder 4.4)		Macintosh (68k-based)
Mac OS (Classic)	Mac OS (Classic)	1.0 alpha; Sony Test (System “7.0”, Finder 1983-10-04)		Macintosh (68k-based)
Mac OS (Classic)	Mac OS (Classic)	1.0 alpha; Twiggy (Finder 1.6)	MacPaint	Macintosh (68k-based)
Mac OS (Classic)	Mac OS (Classic)	1.0 alpha; Twiggy (Finder 1.6)	MacWrite	Macintosh (68k-based)
Mac OS (Classic)	Mac OS (Classic)	5.1 (System 4.3, Finder 6.0)		Macintosh (68k-based)
Mac OS (Classic)	Mac OS (Classic)	6.0 (System 6.0, Finder 6.1)		Macintosh (68k-based)
Mac OS (Classic)	Mac OS (Classic)	6.0.5 (System 6.0.5, Finder 6.1.5)		Macintosh (68k-based)
Mac OS (Classic)	Mac OS (Classic)	6.0.8 (System 6.0, Finder 6.1)		Macintosh (68k-based)
Mac OS (Classic)	Mac OS (Classic)	7.0.1	Floppy	Macintosh (68k-based)
Mac OS (Classic)	Mac OS (Classic)	7.0.1	Hard Drive	Macintosh (68k-based)	Andrew Warkentin
Mac OS (Classic)	Mac OS (Classic)	7.0a9 (alpha)		Macintosh (68k-based)
Mac OS (Classic)	Mac OS (Classic)	7.1.1	Hard Drive	Macintosh (68k-based)	Andrew Warkentin
Mac OS (Classic)	Mac OS (Classic)	7.5.3		Macintosh (68k-based)	Andrew Warkentin
Mac OS (Classic)	Mac OS (Classic)	System 1.1, Finder 1.1g (a.k.a. “System Software 0.1”)		Macintosh (68k-based)
Mac OS (Classic)	Mac OS (Classic)	System 2.0, Finder 4.1 (a.k.a. “System Software 0.5”)		Macintosh (68k-based)
Mac OS (Classic)	Mac OS (Classic)	System 3.2, Finder 5.3 (a.k.a. “System Software 1.1”)		Macintosh (68k-based)
Mac OS (Classic)	Mac OS (Classic)	System 4.1, Finder 5.5 (a.k.a. “System Software 2.0.1”)		Macintosh (68k-based)
Mac OS (Classic)	Mac OS Copland MCE	8.0 D12 MCE		Macintosh (PowerPC-based)
Mac OS X	Mac OS X	10.0 Developer Preview 1		Macintosh (PowerPC-based)
Mac OS X	Mac OS X	10.0 Developer Preview 2		Macintosh (PowerPC-based)
Mac OS X	Mac OS X	10.0 Developer Preview 3		Macintosh (PowerPC-based)
Mac OS X	Mac OS X	10.0 Developer Preview 4		Macintosh (PowerPC-based)
Mac OS X	Mac OS X	10.0 Public Beta 1H39		Macintosh (PowerPC-based)
Mac OS X	Mac OS X	10.0.0		Macintosh (PowerPC-based)
Mac OS X	Mac OS X	10.1.0		Macintosh (PowerPC-based)
Mac OS X	Mac OS X	10.2.0		Macintosh (PowerPC-based)
Mac OS X	Mac OS X	10.3.9		Macintosh (PowerPC-based)
Mac OS X	Mac OS X	10.4.11		Macintosh (PowerPC-based)
Mac OS X	Mac OS X	10.5.9 (Sorbet Leopard)		Macintosh (PowerPC-based)
Mach/4.3BSD	Mach/4.3BSD	2019		VAX	Jason Stevens (neozeed)	Link
Mach386	Mach386	2.6 #1.0 (X108+MSD)		x86 PC	Andrew Warkentin
MachTen	MachTen	2.3		Macintosh (68k-based)	Andrew Warkentin
MachTen	Power MachTen	4.1.4		Macintosh (PowerPC-based)	Andrew Warkentin
MacMinix	MacMinix	1.5		Macintosh (68k-based)	Andrew Warkentin
MacMiNT	MacMiNT	1.12.6 (19980813)		Macintosh (68k-based)	Andrew Warkentin
MacWorks XL	MacWorks XL	3.0 (Mac OS: 4)		Lisa
Magic Cap	Magic Cap	3.1 (build 2001)		Hosted OSes (non-emulated)
Managarm	Managarm	2021-05-30		x86 PC
MandrakeLinux	MandrakeLinux	8.2		x86 PC	Andrew Warkentin
MandrakeLinux	MandrakeMove	10.0		x86 PC
Marist College Linux/390	Marist College Linux/390	2001-05-01		System/360 and compatible	Andrew Warkentin
MAS	MAS	8.12		P853/P854/P857/P858/P859	Theo Engel	Link
MAS	MAS	9		P853/P854/P857/P858/P859	Theo Engel	Link
MaxOS Linux	MaxOS Linux	376.07142000 (Genesis Version Deluxe)		x86 PC	Andrew Warkentin
MCC Interim Linux	MCC Interim Linux	0.99p10+		x86 PC
MCC Interim Linux	MCC Interim Linux	0.99p8+		x86 PC
MCC Interim Linux	MCC Interim Linux	1.0+		x86 PC
MCC Interim Linux	MCC Interim Linux	1.2		x86 PC
MDEX	MDEX for Cortex	CX 3.38		ETI/PowerTran Cortex and derivatives
MDEX	MDEX for Mini-Cortex	CX 3.4		ETI/PowerTran Cortex and derivatives		Link
MDOS (Motorola)	MDOS (Motorola)	3.05		EXOR 6800-based development systems
MDOS (Myarc)	MDOS (Myarc)	6.50		Geneve 9640
Medos	Medos	4.2		Lilith	Jos Dreesen
Medos	Medos	5.2		Lilith	Jos Dreesen
Memotech CP/M	Memotech CP/M	2.2	CFX-II	MTX500/MTX512/RS128	Dave Stevenson
Memotech CP/M	Memotech CP/M	2.2	No CFX-II	MTX500/MTX512/RS128
Memotech CP/M	Memotech CP/M (HexTrain)	2.2		MTX500/MTX512/RS128	Dave Stevenson
Memotech Disk BASIC	Memotech Disk BASIC		CFX-II	MTX500/MTX512/RS128	Dave Stevenson
Memotech Disk BASIC	Memotech Disk BASIC		No CFX-II	MTX500/MTX512/RS128
MenuetOS	MenuetOS	0.76		x86 PC
MenuetOS 64	MenuetOS 64	0.18		x86 PC
Micro Color BASIC	Micro Color BASIC (Alice 90)	2.4		Tandy MC-10/Matra Alice
Micro Color BASIC	Micro Color BASIC (MC10)	2.4		Tandy MC-10/Matra Alice
Micro Complex DOS	Micro Complex DOS	7.0		NorthStar Horizon	Peter Schorn	Link
Micro OS X	Micro OS X	2.1		x86 PC
Micro Technology MZ-80B CP/M	Micro Technology MZ-80B CP/M	2.2.2		MZ-80B/2x00 family
Micro/RSX	Micro/RSX	1.0 BL7.0		PDP-11 (Unibus/Qbus-based)
Microbee 128K CP/M	Microbee 128K CP/M	2.20		Microbee Z80 machines
Microbee 128K CP/M for 256TC	Microbee 128K CP/M for 256TC	2.20		Microbee Z80 machines
Microbee 56K CP/M	Microbee 56K CP/M	2.2		Microbee Z80 machines
Microbee 56K CP/M with CCPZ	Microbee 56K CP/M with CCPZ	2.2		Microbee Z80 machines
Microbee 56K CP/M with ZCPR 1	Microbee 56K CP/M with ZCPR 1	2.2		Microbee Z80 machines
Microbee 56K CP/M with ZCPR 1	Microbee 56K CP/M with ZCPR 2	2.2		Microbee Z80 machines
Microbee CP/M Plus	Microbee CP/M Plus	3.0		Microbee Z80 machines
Micropolis MDOS for Vector Graphic	Micropolis MDOS for Vector Graphic	3.0		Vector Graphic S-100 systems	Peter Schorn	Link
Microport System V/386	Microport System V/386 Release 3.2	3.2.2 (2.0L)		x86 PC	Antoni Sawicki (tenox)
Microport System V/AT	Microport System V/AT Release 2	2.3.0-L		x86 PC	Andrew Warkentin
Microsoft OS/2	Microsoft OS/2	1.0 Beta 3.42.1.1		x86 PC	Andrew Warkentin
Microsoft OS/2	Microsoft OS/2	1.1 Beta 4.72		x86 PC	Andrew Warkentin
Microsoft OS/2	Microsoft OS/2	1.1 Beta 4.99		x86 PC	Andrew Warkentin
Microsoft OS/2	Microsoft OS/2	1.30.1		x86 PC	Andrew Warkentin
Microsoft OS/2	Microsoft OS/2 (Nokia OEM)	1.1		x86 PC	Andrew Warkentin
Microworld Standalone Disk BASIC	Microworld Disk BASIC			Microbee Z80 machines
MikeOS	MikeOS	1.0.0		x86 PC
MIKROS	MIKROS	2.2		IQ-151
Mikrosha FORTH	Mikrosha FORTH	6.3		Mikrosha
Mikrosha tape software collection	Mikrosha tape software collection			Mikrosha
Minerva	Minerva	1.89		Sinclair QL family
Minerva	Minerva	1.97		Sinclair QL family
Minerva	Minerva	1.98	Minimal system	Sinclair QL family
Minerva	Minerva	1.98	QL/E (shares disk images with SMSQ/E QL/E)	Sinclair QL family		Link
Mini-Unix	Mini-Unix			PDP-11 (Unibus/Qbus-based)
Minirighi	Minirighi	0.10.03		x86 PC
Minix	Minix	1.1		x86 PC	Hampa Hug	Link
Minix	Minix	1.5	Linux 0.1x development	x86 PC	Jiong Zhao
Minix	Minix	1.5	Stock (mostly)	x86 PC	Jiong Zhao
Minix	Minix	2.0.4		x86 PC	Andrew Warkentin
Minix	Minix	3.1.1		x86 PC	Andrew Warkentin
Minix	Minix	3.1.2-b2		x86 PC	Andrew Warkentin
Minix	Minix	3.1.5-b5547		x86 PC	Andrew Warkentin
Minix	Minix	3.2.0		x86 PC	Andrew Warkentin
Minix	Minix	3.3.0		x86 PC	Andrew Warkentin
Minix	Minix	3.4.0rc6		x86 PC	Andrew Warkentin
Minix	Minix for Atari ST	1.5		Atari ST/TT/Falcon		Link
Minix-VMD	Minix-VMD	1.7.0		x86 PC	Andrew Warkentin
MINTIA	MINTIA for fox32	0.1 (2025-08-26 23:17:22)		fox32
MINTIA	MINTIA for x86 PC	0.1 (2025-12-29)		x86 PC
MINTIA	MINTIA for XRstation	0.1 (2025-08-26 23:17:22)		XR/station
MIPS RISC/os	MIPS RISC/os (UMIPS)	4.52		ARC, MIPS Computer Systems, and compatible workstations/servers		Link
MIR	MIR	002		x86 PC
MIT CADR ZetaLisp System	MIT CADR ZetaLisp System	78.48		CADR		Link
MK-85 BASIC	MK-85 BASIC			MK-85/MK-90
MK-90 BASIC	MK-90 BASIC	2.0		MK-85/MK-90
MKDOS	MK-DOS	3.15		BK 0010/BK 0011
MKDOS	MK-DOS	3.17		BK 0010/BK 0011
MKDOS	MKDOS	2.10		BK 0010/BK 0011
MMS CP/M	MMS CP/M	3.0		H8/H88/H89
MNBIOS	MNBIOS	Demo 3		MSX
ModulOS	ModulOS	0.3.3		x86 PC
Mona	Mona	0.2.0		x86 PC
Mona	Mona	0.3.0		x86 PC
MONITOR-6	MONITOR-6			UNIVAC 490/1230	Stephen Boyd	Link
Montana State University Time-Shared BASIC	Montana State University BASIC			HP 21xx/1000/2000	Roberto Sancho Villa
Montezuma Micro CP/M for TRS-80 Model 4	Montezuma Micro CP/M for TRS-80 Model 4P	2.2 (BIOS 2.30)		TRS-80 Model I/III/4	Ian Mavric	Link
MorphOS	MorphOS	3.17		Macintosh (PowerPC-based)	Andrew Warkentin
Mort	Mort	0.5 (2006-11-03)		x86 PC
MOS for BBC Master 128	MOS for BBC Master 128	3.20	ARM Evaluation System	BBC Micro
MOS for BBC Master 128	MOS for BBC Master 128	3.20	Base	BBC Micro
MOS for BBC Master 128	MOS for BBC Master 128	3.20	Z80 Tube, with Acorn CP/M 2.2	BBC Micro
MOS for BBC Master 128	MOS for BBC Master 128	3.50	32016 Tube	BBC Micro
MOS for BBC Master 128	MOS for BBC Master 128	3.50	Base	BBC Micro
MOS for BBC Master 128	MOS for BBC Master 512	3.20		BBC Micro
MOS for BBC Master Compact	MOS for BBC Master Compact	5.10	Base	BBC Micro
MOS for BBC Model B	MOS for BBC Model B	0.1		BBC Micro
MOS for BBC Model B	MOS for BBC Model B	1.20		BBC Micro
MP/M for Altair (from Peter Schorn)	MP/M for Altair	2.1	CP/NET server	Altair		Link
MP/M for Altair (from Peter Schorn)	MP/M for Altair	2.1	Regular system	Altair		Link
MP/M for P112	MP/M for P112	1.1		P112		Link
MP/M for P112	MP/M for P112	2.1		P112		Link
MP/M-86 for Compupro 8/16	MP/M-86 for Compupro 8/16	2.1		CompuPro S100 systems	Peter Schorn	Link
MP/OS	MP/OS	3.02		Nova	Bruce Ray	Link
MPE (Classic)	MPE-V/E	G.40.00		HP 3000 Classic (CISC)	Gavin from MPE Forever
MPE (Classic)	MPE-V/R	E.01.00		HP 3000 Classic (CISC)	Gavin from MPE Forever
MPL OS	MPL OS	2023-01-17		X68000 family
MPOS	MPOS	E.29		PERQ	Skeezics Boondoggle	Link
MPX-32	MPX-32	3.4		SEL/Gould 32-bit series	James C. Bevier	Link
MS-DOS (PC reference version)	MS-DOS	3.30	Floppy; with Windows 1.01	x86 PC	Nathan Lineback	Link
MS-DOS (PC reference version)	MS-DOS	3.30	With GRID-OS 3.31	x86 PC	Thomas Cherryhomes	Link
MS-DOS (PC reference version)	MS-DOS	4.01	With Windows 3.0	x86 PC	Andrew Warkentin
MS-DOS (PC reference version)	MS-DOS	4.01	With Windows 3.0 Beta 1.33	x86 PC	Andrew Warkentin
MS-DOS (PC reference version)	MS-DOS	4.01	With Windows 3.0 beta 1.55	x86 PC	Andrew Warkentin
MS-DOS (PC reference version)	MS-DOS	5.0	Minimal boot floppy	x86 PC
MS-DOS (PC reference version)	MS-DOS	5.0	w/PC-Choices	x86 PC	Andrew Warkentin
MS-DOS (PC reference version)	MS-DOS	5.0	With HP 200 LX Application Manager (Connectivity Pack)	x86 PC	Andrew Warkentin
MS-DOS (PC reference version)	MS-DOS	5.0	With NetWare 4.11	x86 PC	Andrew Warkentin
MS-DOS (PC reference version)	MS-DOS	5.0	With Windows 3.1	x86 PC	Andrew Warkentin
MS-DOS (PC reference version)	MS-DOS	5.0	With Windows 3.1 beta 026	x86 PC	Andrew Warkentin
MS-DOS (PC reference version)	MS-DOS	6.22	w/CoIdris	x86 PC	Hans-Ake Lund	Link
MS-DOS (PC reference version)	MS-DOS	6.22	With COROS LS-B 4.01	x86 PC
MS-DOS (PC reference version)	MS-DOS	6.22	With DESQview/X 2.1	x86 PC	Andrew Warkentin, Unknown developer
MS-DOS (PC reference version)	MS-DOS	6.22	With Windows 3.11 and NewDeal 2000	x86 PC	Unknown developer
MS-DOS (PC reference version)	MS-DOS	7.1.1111 (from Windows 95 OSR2)	Boot floppy	x86 PC
MS-DOS (PC reference version)	MS-DOS	8.0.3000 (from Windows ME)	Boot floppy	x86 PC
MS-DOS for Cromemco	MS-DOS for Cromemco	1.25		Cromemco S100 systems	Peter Schorn	Link
MS-DOS for FM Towns	MS-DOS for FM Towns (with TownsOS)	3.1 L24 (Towns System Software 1.1 L20)		FM TOWNS/FMR family
MS-DOS for FM Towns	MS-DOS for FM Towns (with TownsOS)	6.20 L10 (Towns System Software 2.1 L51)		FM TOWNS/FMR family
MS-DOS for M20 with second processor	MS-DOS for M20 with second processor	2.00		M20
MS-DOS for MZ-6550	MS-DOS for MZ-6550 (2Z-048)	2.11		MZ-5500/MZ-6500 family
MS-DOS for PC-D	MS-DOS for PC-D	2.11		PC-X/PC-D		Link
MS-DOS for PC-D	MS-DOS for PC-D	3.10		PC-X/PC-D
MS-DOS for Rainbow	MS-DOS for Rainbow	2.01		Rainbow 100
MS-DOS for Rainbow	MS-DOS for Rainbow	2.05		Rainbow 100
MS-DOS for Rainbow	MS-DOS for Rainbow	2.11		Rainbow 100
MS-DOS for Rainbow	MS-DOS for Rainbow	3.10		Rainbow 100
MSX-DOS	MSX-DOS	1.0	Floppy	MSX
MSX-DOS	MSX-DOS	1.03	Hard disk w/SymbOS 1.1	MSX
MSX-DOS	MSX-DOS	2.31	Floppy	MSX
MSX-DOS	MSX-DOS for MZ-2500 (Multiplan)	1.00		MZ-80B/2x00 family
MSX-DOS for Aleste	MSX-DOS for Aleste	1.04		CPC/Aleste
MTS	MTS	D6.0A		System/360 and compatible
muLinux	muLinux	13r2		x86 PC
Multics	Multics	MR12.8		GE 600, Honeywell/Bull 6000/DPS-8		Link
Multitasking MS-DOS (Goupil OEM)	Multitasking MS-DOS (Goupil OEM)	4.00		x86 PC
Multitasking MS-DOS (reference PC port)	Multitasking MS-DOS	4.00		x86 PC
MULTOS/8	MULTOS-8	3D (base OS/8 system)		PDP-5/PDP-8 family
Munching Squares for PDP-1	Munching Squares for PDP-1			PDP-1
Mungkie Linux	Mungkie Linux (1diskxwin)	1.2		x86 PC
MUSIC/SP	MUSIC/SP	6.2		System/360 and compatible	Dave Edwards	Link
MyDOS	MyDOS	4.5		Atari 8-bit computers
MyPicoDOS	MyPicoDOS	4.05	Games	Atari 8-bit computers
MZ-1500 booter software collection	MZ-1500 booter software collection			MZ-80K/80C/80A/700/800/1500 family
MZ-2000 tape software collection	MZ-2000 tape software collection			MZ-80B/2x00 family
MZ-2000/2200 CP/M by Toshio Fukui	MZ-2000/2200 CP/M by Toshio Fukui	2.2		MZ-80B/2x00 family
MZ-2000/2200 CP/M by Toshio Fukui	MZ-2000/2200 CP/M by Toshio Fukui	2.2 Release 1.1		MZ-80B/2x00 family
MZ-2000/2200 CP/M by Toshio Fukui	MZ-2000/2200 CP/M by Toshio Fukui	2.2 Release 1.2		MZ-80B/2x00 family
MZ-2500 disk booter software collection	MZ-2500 disk booter software collection			MZ-80B/2x00 family
MZ-2500 monitor	MZ-2500 monitor machine language software collection			MZ-80B/2x00 family
MZ-700 booter software collection	MZ-700 booter software collection			MZ-80K/80C/80A/700/800/1500 family
MZ-800 booter software collection	MZ-800 booter software collection			MZ-80K/80C/80A/700/800/1500 family
MZ-80A booter software collection	MZ-80A booter software collection			MZ-80K/80C/80A/700/800/1500 family
MZ-80B tape software collection	MZ-80B tape software collection			MZ-80B/2x00 family
MZ-80K booter software collection	MZ-80K booter software collection			MZ-80K/80C/80A/700/800/1500 family
N20-BASIC	LBC-1100 BASIC			PC-2001 family
N20-BASIC	N20-BASIC			PC-2001 family
N20-BASIC	TPC-8300 BASIC			PC-2001 family
N88-BASIC	N88-BASIC for PC-8801mkII	1.4		PC-8001/8801/88VA family
NAA SpeedEx Assembler	NAA SpeedEx Assembler demo			IBM 701	Roberto Sancho Villa
NABU CP/M	NABU CP/M	3.0		NABU Personal Computer
Nabu IOS	Nabu IOS			NABU Personal Computer
NAS-SYS	NAS-SYS/NAS-DOS	3		Nascom 1/2/3
NetBSD	Mach/Lites/NetBSD	1.1		x86 PC	Jason Stevens (neozeed)	Link
NetBSD	NetBSD	0.8		x86 PC	Jason Stevens (neozeed)	Link
NetBSD	NetBSD	0.9		x86 PC	grem75
NetBSD	NetBSD	1.0		x86 PC
NetBSD	NetBSD	1.6.2		x86 PC
NetBSD	NetBSD	1.6U	Minimal image (QEMU demo)	x86 PC
NetBSD	NetBSD	3.0		x86 PC	Andrew Warkentin
NetBSD	NetBSD for VAX	1.2		VAX
NetOS	NetOS	3.2		HDS/Neoware i960-based X terminals (ViewStation/@workstation)	ajfa
NetWare	NetWare	4.11		x86 PC	Andrew Warkentin
NetWare	NetWare	6.5 SP8		x86 PC	Andrew Warkentin
NEWDOS/80	NEWDOS/80	2.5		TRS-80 Model I/III/4	Ian Mavric	Link
NewOS	NewOS	1999 (2004-06-06)		x86 PC
NewOS	NewOS	2002-07-25		x86 PC
NEWS-OS	NEWS-OS	4.2.1aRD		Sony NEWS MIPS machines	Andrew Warkentin
Newton OS	Newton OS	2.1 (eMate 300)		Newton
Newton OS	Newton OS	2.1 (MessagePad 2000)		Newton
Newton OS	Newton OS	2.1 (MessagePad 2100)		Newton
NeXTStep/OPENSTEP/Rhapsody	NeXTStep	0.8		NeXT 68k machines		Link
NeXTStep/OPENSTEP/Rhapsody	NeXTStep	0.9		NeXT 68k machines		Link
NeXTStep/OPENSTEP/Rhapsody	NeXTStep	1.0		NeXT 68k machines		Link
NeXTStep/OPENSTEP/Rhapsody	NeXTStep	1.0a		NeXT 68k machines		Link
NeXTStep/OPENSTEP/Rhapsody	NeXTStep	2.0		NeXT 68k machines		Link
NeXTStep/OPENSTEP/Rhapsody	NeXTStep	2.1		NeXT 68k machines		Link
NeXTStep/OPENSTEP/Rhapsody	NeXTStep	2.2		NeXT 68k machines		Link
NeXTStep/OPENSTEP/Rhapsody	NeXTStep	3.0		NeXT 68k machines		Link
NeXTStep/OPENSTEP/Rhapsody	NeXTStep (68k)	3.1		NeXT 68k machines		Link
NeXTStep/OPENSTEP/Rhapsody	NeXTStep (68k)	3.2		NeXT 68k machines		Link
NeXTStep/OPENSTEP/Rhapsody	NeXTStep (68k)	3.3		NeXT 68k machines		Link
NeXTStep/OPENSTEP/Rhapsody	NeXTStep (x86)	3.3		x86 PC	Andrew Warkentin
NeXTStep/OPENSTEP/Rhapsody	OPENSTEP (68k)	4.0		NeXT 68k machines		Link
NeXTStep/OPENSTEP/Rhapsody	OPENSTEP (68k)	4.2		NeXT 68k machines		Link
NeXTStep/OPENSTEP/Rhapsody	OPENSTEP (x86)	4.2		x86 PC	Andrew Warkentin
NeXTStep/OPENSTEP/Rhapsody	Rhapsody (Mac OS X Server 1.x)	5.6 (1.2v3)		Macintosh (PowerPC-based)
NeXTStep/OPENSTEP/Rhapsody	Rhapsody (x86)	5.1 (DR2)		x86 PC	Andrew Warkentin
NextZXOS	NextZXOS	2.06h		Sinclair ZX Spectrum and 100% clones
Nintendo ES	Nintendo ES	0.1.5		x86 PC
NitrOS-9	NitrOS-9 Level 1 for Dragon 32/64	3.2.4		Dragon 32/64/200
NitrOS-9	NitrOS-9 Level 1 for Dragon Alpha	3.2.4		Dragon Professional/Alpha
NitrOS-9	NitrOS-9/6309 for CoCo 3	3.2.6		Color Computer	Andrew Warkentin
Nokia CP/M for MikroMikko 1	Nokia CP/M	2.2 * M6		MikroMikko 1
NoName	NoName	2003-03-12		x86 PC
NORC tape demo	NORC tape demo			NORC	Roberto Sancho Villa
NORD	NORD	2.11		BK 0010/BK 0011
NorthStar CP/M	CP/M for Horizon	2.2	32k version	NorthStar Horizon	Peter Schorn	Link
NorthStar CP/M	CP/M for Horizon	2.2	64k version	NorthStar Horizon	Peter Schorn	Link
NorthStar DOS	NorthStar DOS for Altair	5.1		Altair	Dave Dunfield	Link
NorthStar DOS	NorthStar DOS for Horizon	2.1.1	Double density	NorthStar Horizon	Peter Schorn	Link
NorthStar DOS	NorthStar DOS for Horizon	2.1.1	Quad Density	NorthStar Horizon	Peter Schorn	Link
NorthStar DOS	NorthStar DOS for Horizon	5.0		NorthStar Horizon
NorthStar DOS	NorthStar DOS for Horizon	5.1		NorthStar Horizon
NorthStar DOS	NorthStar DOS for SOL	5.2DQ		SOL-10/20/PC	Jim Battle	Link
NORTON-BK	NORTON-BK	1.02		BK 0010/BK 0011
NOS	NOS	1.3 PSR 485 (Florida State University customized)		CDC 6x00/Cyber 70/Cyber 170/Cyber 180		Link
NOS	NOS	2.8.1 (PSR 803)		CDC 6x00/Cyber 70/Cyber 170/Cyber 180
NOS	NOS	2.8.7	860 dual-state with NOS/VE	CDC 6x00/Cyber 70/Cyber 170/Cyber 180		Link
NOS	NOS	2.8.7	875 with CYBIS	CDC 6x00/Cyber 70/Cyber 170/Cyber 180		Link
NOS/MT	NOS/MT for Mini-Cortex	CX 3.0		ETI/PowerTran Cortex and derivatives		Link
NOS/VE	NOS/VE	1.8.3 L857		CDC 6x00/Cyber 70/Cyber 170/Cyber 180		Link
Nova/Eclipse RDOS	Eclipse Mapped RDOS (ZRDOS)	7.50		Eclipse		Link
Nova/Eclipse RDOS	Eclipse Mapped RDOS (ZRDOS)	7.60		Eclipse	Bruce Ray	Link
Nova/Eclipse RDOS	Nova Unmapped RDOS (URDOS)	7.50		Nova		Link
NR9003 Assembler	NR9003 Assembler demo			IBM 701	Roberto Sancho Villa
NT-based Windows	Windows 2000 Professional	5.00.2195 (SP4)		x86 PC	Andrew Warkentin
NT-based Windows	Windows Cairo beta (never finished next-generation NT version)	4.0.1175		x86 PC	Andrew Warkentin
NT-based Windows	Windows Longhorn (Vista beta, pre-reset)	6.0.3683		x86 PC	Andrew Warkentin
NT-based Windows	Windows Longhorn (Vista beta, pre-reset)	6.0.4008		x86 PC	Andrew Warkentin
NT-based Windows	Windows Longhorn (Vista beta, pre-reset)	6.0.4020		x86 PC	Andrew Warkentin
NT-based Windows	Windows Longhorn (Vista beta, pre-reset)	6.0.4032.Lab06_n.030710-1709		x86 PC	Andrew Warkentin
NT-based Windows	Windows Longhorn (Vista beta, pre-reset)	6.0.4051.idx02.031001-1340		x86 PC	Andrew Warkentin
NT-based Windows	Windows Neptune (“Windows 2000 Personal” beta)	5.50.5111		x86 PC	Andrew Warkentin
NT-based Windows	Windows NT 3.1	3.1.511 (original RTM)		x86 PC	Andrew Warkentin
NT-based Windows	Windows NT 3.1 beta	3.1 (1991-10-16, build 205?)		x86 PC	Andrew Warkentin
NT-based Windows	Windows NT 3.1 beta	3.1.196		x86 PC	Andrew Warkentin
NT-based Windows	Windows NT 3.1 beta	3.1.239		x86 PC	Andrew Warkentin
NT-based Windows	Windows NT 3.1 beta	3.1.340		x86 PC	Andrew Warkentin
NT-based Windows	Windows NT 3.51	3.51.1057 (SP5)		x86 PC	Andrew Warkentin
NT-based Windows	Windows NT 4	4.0.1381 (SP1)		x86 PC	Andrew Warkentin
NT-based Windows	Windows NT 4 beta	4.0.1130		x86 PC	Andrew Warkentin
NT-based Windows	Windows NT 4 for MIPS	4.0.1381 (SP1)		ARC, MIPS Computer Systems, and compatible workstations/servers	Antoni Sawicki (tenox)	Link
NT-based Windows	Windows NT 5.0 (Windows 2000) beta	5.0.1729		x86 PC	Andrew Warkentin
NT-based Windows	Windows Whistler (XP beta)	5.1.2267.idx01.000909-1503		x86 PC	Andrew Warkentin
NT-based Windows	Windows Whistler (XP beta)	5.1.2410.main.001208-1937		x86 PC	Andrew Warkentin
NT-based Windows	Windows Whistler (XP beta)	5.1.2430.main.010130-1821		x86 PC	Andrew Warkentin
NT-based Windows	Windows XP Professional	5.1.2600.xpsp.080413-2111 (SP3)		x86 PC	Andrew Warkentin
NT-DOS	NT-DOS	4		Commodore 128
NWSOS	NWSOS	0.034		x86 PC
OASIS	OASIS for TRS-80 Model II	5.5		TRS-80 Model II/12/16/6000
OASIS	OASIS for Vector Graphic	5.5 (multi-user)		Vector Graphic S-100 systems	Peter Schorn	Link
Oberon System	Native Oberon (PC)	3 (PC Native 2.3.6)		x86 PC	Andrew Warkentin
Oblivion	Oblivion	0.03		x86 PC
OnThree BOS	OnThree BOS	1.0		Apple III		Link
Onyx	Onyx	1.02		Agat
Onyx	Onyx	1.07		Agat
Onyx	Onyx	1.2		Agat
OpenBLT	OpenBLT	2000-05-17		x86 PC
OpenBSD	OpenBSD	3.5		x86 PC
OpenDarwin	OpenDarwin	7.2.1		x86 PC	Andrew Warkentin
OpenMoko	OpenMoko	2007.11		Neo
OpenServer SVR5	OpenServer	6.0.0		x86 PC	Andrew Warkentin
OpenZaurus	OpenZaurus (GPE)	3.5.2		Zaurus SL series
OpenZaurus	OpenZaurus (Opie)	3.5.2		Zaurus SL series
Operators’ Executive	Operators’ Executive (E6RM)	Mark 1 Version 5 (Gen 54)		FP 6000/ICL 1900
OrangePekoe	OrangePekoe	0.12.0126.20040919		x86 PC
ORDOS	ORDOS	4.03		Orion
Oric booter software collection	Oric booter software collection			Oric machines (inc. clones)
Oric DOS	Oric DOS	1.13		Oric machines (inc. clones)
Orion PRODOS	Orion PRODOS	1.01		Orion
Orion PRODOS	Orion PRODOS	1.10		Orion
Orion PRODOS	Orion PRODOS	2.00		Orion
Orix	Orix	2022.4 (20221011)		Oric machines (inc. clones)		Link
OS BK-11	OS BK-11	4.1		BK 0010/BK 0011
OS-65D	OS-65D for C1P	3.3	Tutorial, with menu system	Challenger/Superboard series
OS-65D	OS-65D for C4PMF	3.1	Dealer demo	Challenger/Superboard series
OS-65D	OS-65D for C4PMF	3.1	Games Disk III	Challenger/Superboard series
OS-65D	OS-65D for C4PMF	3.3	Hi-res graphics	Challenger/Superboard series
OS-65D	OS-65D for C4PMF	3.3	Tutorial, with menu system	Challenger/Superboard series
OS-65D	OS-65D for C8PDF	3.1	With DQ Secretary menu system	Challenger/Superboard series
OS-65D	OS-65D for C8PDF	3.2	Plot BASIC	Challenger/Superboard series
OS-65D	OS-65D for C8PDF	3.3	Tutorial, with menu system	Challenger/Superboard series
OS-65U	OS-65U	1.42		Challenger/Superboard series
OS-9 for CoCo	OS-9 Level II for CoCo 3	2.0.1		Color Computer
OS-9 for MO5	OS-9 for MO5	2.0.1		TO/MO series
OS-9 Level 1 for Dragon 32/64	OS-9 Level 1 for Dragon 32/64	1.2		Dragon 32/64/200
OS-9 Level 1 for Dragon 32/64	OS-9 Level 1 for Dragon Alpha	1.2		Dragon Professional/Alpha
OS-9 Level 1 for SWTPC 6809	OS-9 Level 1 for SWTPC 6809	1.2		SWTPC 6809	Michael Evenson	Link
OS-9 Level II for FM-11	OS-9 Level II for FM-11	1.2J		FM-7x/8x/11 series
OS-9/68K for X68000	OS-9/68K for X68000	2.4	PWIN	X68000 family	Andrew Warkentin
OS-9/68K for X68000	OS-9/68K for X68000	2.4	Text console	X68000 family	Andrew Warkentin
OS-9/x86 (a.k.a. OS-9000/x86)	OS-9/x86 (a.k.a. OS-9000/x86)	6.1		x86 PC
OS-AMU	Kitahei (OS-AMU)	V01a		MZ-80B/2x00 family
OS-DOS	OS-DOS	1.0		Orion
OS-DOS	OS-DOS	2.3		Orion
OS-DOS	OS-DOS	2.31		Orion
OS-DOS	OS-DOS	2.41		Orion
OS-DOS	OS-DOS	2.61		Orion
OS-DOS	OS-DOS	3.60		Orion
OS-DOS	OS-DOS	3.62		Orion
OS-DOS	OS-DOS	3.70		Orion
OS-X	OS-X	2.0		ZEMU paravirtualized Z80 SBC
OS/3	OS/3	4.2		Univac Series 90/System 80	Stephen Boyd	Link
OS/32	OS/32	6.2		Interdata/Perkin-Elmer 32-bit series
OS/32	OS/32	7.2		Interdata/Perkin-Elmer 32-bit series
OS/32	OS/32	8.1		Interdata/Perkin-Elmer 32-bit series	David Wijnants
OS/360 MVT	OS/360 MVT	21.8f	ASP	System/360 and compatible
OS/360 MVT	OS/360 MVT	21.8f	HASP	System/360 and compatible
OS/390	OS/390	2.10		System/360 and compatible
OS/78	OS/78	1		PDP-5/PDP-8 family	David Gesswein
OS/8	OS-8	3D	With MULTOS-8	PDP-5/PDP-8 family
OS/8	OS-8	3Q	Regular image	PDP-5/PDP-8 family	Doug Jones	Link
OS/8	OS-8	3Q	With ETOS V5B	PDP-5/PDP-8 family	David Gesswein
OS/A65	OS/A65 for 32k PET	2.0.0		PET/CBM series
OS/A65	OS/A65 for C64	2.0.0		Commodore 64
OS/A65	OS/A65 for CBM 8x96	2.0.0		PET/CBM series
OS/M	OS/M	3.0		P8000
OS/VS1	OS/VS1	6.0		System/360 and compatible	Roberto Sancho Villa	Link
OS/VS1	OS/VS1	6.7		System/360 and compatible	Roberto Sancho Villa	Link
OS/VS2 MVS	OS/VS2 MVS	3.8J (TK4-)		System/360 and compatible	Juergen Winkelmann	Link
OSA for MS-0515	OSA for MS-0515	1.0		MS 0515
OSASK	OSASK	4.6		x86 PC
OSSO	OSSO	0.0.6		x86 PC
OZ	OZ	2.2.0		Z88
OZ	OZ	3.0		Z88
OZ	OZ	4.0		Z88
OZ	OZ	4.2		Z88
OZ	OZ	4.3.1		Z88
OZ	OZ	4.4.1		Z88
OZ	OZ	4.5		Z88
OZ	OZ	4.6		Z88
OZ	OZ	4.7		Z88
OZ	OZ	5.0 Beta (Git revision 87d56ee)		Z88
OZONE (a.k.a. O3ONE)	OZONE	2004-01-03		x86 PC
P-System	P-System for LSI-11	II.0		PDP-11 (Unibus/Qbus-based)
P-System for RC702	P-System for RC702	II.0		RC702
P.I.M.P.S. Monitor	P.I.M.P.S. Monitor	1.0		NorthStar Horizon
P/OS	P/OS	3.2		PRO-3xx	Tarik Isani	Link
P?S/8	P?S/8	Z		PDP-5/PDP-8 family
Palm OS Classic	Palm OS	4.1.2		Palm devices (68k-based)
Palm OS Classic	Palm OS for Garnet VM	5.5.0		Palm devices (ARM-based)
Palm OS Classic	Palm OS Garnet	5.2.1 (Tungsten T3)		Palm devices (ARM-based)
Palm OS Classic	Palm OS Garnet	5.4.7 (Tungsten E2)		Palm devices (ARM-based)
Palm OS Cobalt	Palm OS Cobalt	6.1.0 (Tungsten T3)		Palm devices (ARM-based)
PAMPUK Disk FORTH	PAMPUK Disk FORTH	1.0		Interact/Victor Lambda/Hector family
Panos	Panos	1.4		BBC Micro
PB-1000 OS	PB-1000 OS			PB-1000/2000
PB-1000 OS	PB-2000C OS			PB-1000/2000
PC-6001 N60-BASIC	PC-6001 N60-BASIC			PC-6001/6601 series
PC-6001 N60-BASIC	PC-6001A N60-BASIC			PC-6001/6601 series
PC-6001 N60-BASIC	PC-6001mk2 N60-BASIC			PC-6001/6601 series
PC-6001 N60-BASIC	PC-6001mkIISR N60/N66-BASIC			PC-6001/6601 series
PC-6001 N60-BASIC	PC-6601 N60/N66-BASIC			PC-6001/6601 series
PC-6001 N60-BASIC	PC-6601SR N60/N66-BASIC			PC-6001/6601 series
PC-98 MS-DOS	NEC MS-DOS for PC-98	3.30		PC-9800 series	kobushi from NFGGames	Link
PC-98 MS-DOS	NEC MS-DOS for PC-98	6.20		PC-9800 series	kobushi from NFGGames	Link
PC-BSD (FreeBSD)	PC-BSD (FreeBSD)	0.7.8 (based on 5.4)		x86 PC	Andrew Warkentin
PC-DOS	PC-DOS	1.0		x86 PC
PC-DOS	PC-DOS	1.1		x86 PC
PC-DOS	PC-DOS	2.00	w/Visi On 1.0	x86 PC		Link
PC-DOS	PC-DOS 2000	7.0.1	With Breadbox Ensemble 4.1.3	x86 PC	Andrew Warkentin
PC-E5x0 OS	PC-E5x0 OS		PC-E500	Sharp ESR-L (SC62015)-based pocket computers
PC-E5x0 OS	PC-E5x0 OS		PC-E500S	Sharp ESR-L (SC62015)-based pocket computers
PC-E5x0 OS	PC-E5x0 OS		PC-E550	Sharp ESR-L (SC62015)-based pocket computers
PC-Engine	PC-Engine	1.1		PC-8001/8801/88VA family
PC-G8xx OS	PC-G850V OS			PC-G/U/E series
PC-MOS	PC-MOS	1.02		x86 PC
PC/IX	PC/IX	1.0		x86 PC	Hampa Hug	Link
PCIF (TI P-System)	PCIF (TI P-System)	1.2.1		TI 990
PCOS	PCOS	1.0.2		M20
PCOS	PCOS	1.3		M20
PCOS	PCOS	1.3d		M20
PCOS	PCOS	1.3f		M20
PCOS	PCOS	2.0f		M20
PCOS	PCOS	2.0h		M20
PCOS	PCOS	3.0e		M20
PCOS	PCOS	4.1a		M20
PCPI CP/M	PCPI Appli-Card CP/M	2.2		Apple III		Link
PCVMS	PCVMS	1.08		x86 PC	Andrew Warkentin
PCW CP/M Plus	PCW CP/M Plus	3.0 v1.1 (bundled with PCW 8000 series)		PCW
PCW CP/M Plus	PCW CP/M Plus	3.0 v1.12 (included with PCW10)		PCW
PDOS	PDOS/390	Stage 67		System/360 and compatible		Link
PDP-8/I 4K Disk Monitor System	PDP-8/I 4K Disk Monitor System		Master disk	PDP-5/PDP-8 family		Link
PDP-8/I 4K Disk Monitor System	PDP-8/I Disk Monitor System		Demo	PDP-5/PDP-8 family
Pedigree	Pedigree	0.1 (Foster)		x86 PC
Pegasus Initial Orders	Pegasus Initial Orders			Pegasus
PEN/GEOS	Nokia 9110 PEN/GEOS (Windows-hosted simulator)	3.6.10		x86 PC	Andrew Warkentin
Personal CP/M for Adam	Personal CP/M for Adam	1.00		Adam/ColecoVision
Personal CP/M for Altair (from Peter Schorn)	Personal CP/M for Altair	1.0		Altair		Link
Personal CP/M-86 for PC	Personal CP/M-86	2.04 (PC)		x86 PC
PERT for NORC	PERT for NORC			NORC	Roberto Sancho Villa
Phoenix RTOS	Phoenix RTOS	1.1		x86 PC
Pick System	Pick System	R83 V3.1		x86 PC	Krowemoh	Link
Pickles & Trout CP/M for TRS-80 Model II	Pickles & Trout CP/M for TRS-80 Model II	2.2m		TRS-80 Model II/12/16/6000
Pico-DOS for C1P	Pico-DOS for C1P	1.0	Regular system	Challenger/Superboard series
Pico-DOS for C1P	Pico-DOS for C1P	1.0	Victory Software Games	Challenger/Superboard series
Pilot (Interlisp-D)	Pilot (Interlisp-D)	Harmony		D-machine family		Link
Pilot (ViewPoint)	Pilot (GlobalView)	1.05 for X on SunOS		D-machine family
Pilot (ViewPoint)	Pilot (GlobalView)	2.1 for Windows	For Dwarf	D-machine family
Pilot (ViewPoint)	Pilot (GlobalView)	2.1 for Windows	For original Windows-based emulator	D-machine family	Andrew Warkentin
Pilot (ViewPoint)	Pilot (ViewPoint)	2.0		D-machine family
Pilot (XDE)	Pilot (XDE)	15.3		D-machine family
Pilot (XDE)	Pilot (XDE)	5.0		D-machine family		Link
PK	PK	0.9.2		x86 PC
PK8000 BASIC	PK8000 ROM BASIC	1.2		PK8000 (Sura/Vesta/Hobby/Karat)
PL516	PL516			Honeywell Series 16
Plan 9	Plan 9	2nd Edition		x86 PC	Andrew Warkentin
Plan 9	Plan 9	4th Edition		x86 PC	Andrew Warkentin
Plan B	Plan B	Third Edition		x86 PC
Plexus Sys5	Plexus Sys5.2	5.2r8		Plexus 68k machines
plusBASIC	plusBASIC	0.27a		Aquarius
PN-8800FXB OS	PN-8800FXB OS			Z80-based PowerNote machines
PNX	PNX	1.3		PERQ	Skeezics Boondoggle	Link
PNX	PNX	2.0H		PERQ	Skeezics Boondoggle	Link
Poly-8813 Exec	Poly-8813 Exec	4d	Games	Poly-88 series		Link
Poly-8813 Exec	Poly-8813 Exec	76	ADVENT	Poly-88 series		Link
Poly-8813 Exec	Poly-8813 Exec	96	System disk	Poly-88 series		Link
Poly-8813 Exec	Poly-8813 Exec	96	WordMaster	Poly-88 series		Link
Poly-8813 Exec	Poly-8813 Exec	96	Worm	Poly-88 series		Link
POLYSYS	POLYSYS	3.0		Poly/Proteus
POLYSYS	POLYSYS	3.4		Poly/Proteus
POS	POS	D.61		PERQ	Josh Dersch	Link
POS	POS	F.0		PERQ	Skeezics Boondoggle	Link
POS	POS	F.1		PERQ	Skeezics Boondoggle	Link
POS	POS	F.15		PERQ	Skeezics Boondoggle	Link
POS	POS	G.6		PERQ	Skeezics Boondoggle	Link
POS	POS	G.7		PERQ	Skeezics Boondoggle	Link
Pragma Linux	Pragma Linux	0.0.6 Alpha		x86 PC
Prex	Prex	0.3.0		x86 PC
Prex	Prex	0.7.0		x86 PC
PRIMOS	PRIMOS	18.3.1		Prime minicomputer family		Link
PRIMOS	PRIMOS	19.2		Prime minicomputer family		Link
PRIMOS	PRIMOS	20.2.8		Prime minicomputer family		Link
PRIMOS	PRIMOS	21.0.6		Prime minicomputer family		Link
PRIMOS	PRIMOS	22.1.2		Prime minicomputer family
PRIMOS	PRIMOS	22.1.4c		Prime minicomputer family		Link
PRIMOS	PRIMOS	23.4.Y2K.R1		Prime minicomputer family		Link
PRIMOS	PRIMOS	24.0.0.r15		Prime minicomputer family		Link
ProDOS	ProDOS	1.1.1	w/Apple II GEOS	Apple IIgs
ProDOS	ProDOS	1.1.1	With Apple II Desktop	Apple IIgs
ProDOS	ProDOS	2.0.3		8-bit Apple II series
ProDOS 16	ProDOS 16	1.1		Apple IIgs
ProDOS 16	ProDOS 16	1.3		Apple IIgs
ProDOS 16	ProDOS 16	1.6		Apple IIgs
Prologue	Prologue	2.3b for Olympia People PC		People PC
Prologue	Prologue TwinServer	2.4		x86 PC	evv42	Link
Proolix	Proolix	0.1.2.1		x86 PC
PSI-OS	PSI-OS	12.2		Smaky (68k-based)
Psion Organiser II OS	Organiser II CM OS	2.4		Psion Organiser
Psion Organiser II OS	Organiser II LA OS	3.3		Psion Organiser
Psion Organiser II OS	Organiser II LA OS (Multilingual)	3.7		Psion Organiser
Psion Organiser II OS	Organiser II LZ OS	4.6		Psion Organiser
Psion Organiser II OS	Organiser II LZ64 OS	4.4		Psion Organiser
PTS-DOS	PTS-DOS	2000		x86 PC	Andrew Warkentin
PTS-DOS	PTS-DOS	32 (build 141)		x86 PC
PWB/UNIX	PWB/UNIX	1.0		PDP-11 (Unibus/Qbus-based)	Andrew Warkentin
QED CP/M for ZX Spectrum	CP/M for ZX Spectrum	2.2 (QED 1.15)		Sinclair ZX Spectrum and 100% clones
QEMU x86 Linux demo	QEMU x86 Linux demo	Kernel 2.4.21		x86 PC
QEMU x86 Linux demo	QEMU x86 Linux demo	Kernel 2.5.74		x86 PC
QNX 4	QNX	4.0		x86 PC	Andrew Warkentin
QNX 4	QNX	4.23		x86 PC	Andrew Warkentin
QNX 4	QNX	4.24		x86 PC	Andrew Warkentin
QNX 4	QNX	4.25	Demo floppy (Network v4.00)	x86 PC
QNX 4	QNX	4.25	Hard disk (Full install)	x86 PC	Andrew Warkentin
QNX Classic (0.x-3.x)	QNX	1.2		x86 PC	Mihai Gaitos	Link
QNX Classic (0.x-3.x)	QNX	2.10	Demo floppy	x86 PC
QNX Classic (0.x-3.x)	QNX	2.21		x86 PC	Andrew Warkentin, Antoni Sawicki (tenox)
QNX Classic (0.x-3.x)	QUNIX (QNX beta)	0.4		x86 PC
QNX Neutrino	QNX Neutrino	2.0		x86 PC	Andrew Warkentin
QNX Neutrino	QNX Neutrino	6.0.0		x86 PC	Andrew Warkentin
QNX Neutrino	QNX Neutrino	6.1.0		x86 PC	Andrew Warkentin
QNX Neutrino	QNX Neutrino	6.2.0 (NC)		x86 PC	Andrew Warkentin
QNX Neutrino	QNX Neutrino	6.3.2		x86 PC	Andrew Warkentin
QNX Neutrino	QNX Neutrino	6.4.1		x86 PC	Andrew Warkentin
QP/M for Altair	QP/M for Altair	2.7		Altair		Link
Radio-86RK booter software collection	Radio-86RK booter software collection			Radio-86RK
RAFOS-Plus	RAFOS-Plus	2.1/4.00		PDP-11 (Unibus/Qbus-based)
RAMDOS	RAMDOS	2.02		Mikrosha
RANDOS	RANDOS	1.0		Oric machines (inc. clones)
RANDOS	RANDOS	2.0		Oric machines (inc. clones)
RC 4000 Monitor	RC 4000 Monitor	3.0		RC 4000/RC 8000/RC 9000		Link
RC702 COMAL-80 (standalone)	RC702 COMAL-80 (standalone)	1.06		RC702
RC702 COMAL-80 (standalone)	RC702 COMAL-80 (standalone)	1.07		RC702
RC702 COMAL-80 (standalone)	RC702 COMAL-80 (standalone)	1.08		RC702
RC702 COMAL-80 (standalone)	RC702 COMAL-80 (standalone)	1.11		RC702
RC702 COMAL-80 (standalone)	RC702 COMAL-80 (standalone)	1.12		RC702
RC702 COMAL-80 (standalone)	RC702 COMAL-80 (standalone)	1.13		RC702
RC702 Diagnostics	RC702 Diagnostics			RC702
RCA MicroDOS	RCA MicroDOS	1.1		Microboard-based systems
RCA UT62 Monitor (MCDS)	RCA UT62 Monitor (MCDS)			Microboard-based systems
RDOS (PC)	RDOS (PC)	2006-05-07		x86 PC
ReactOS	ReactOS	0.2.6		x86 PC
ReactOS	ReactOS	0.3.4		x86 PC
ReactOS	ReactOS	0.4.15-dev-6851-g6691cb		x86 PC
Red Hat Linux	Red Hat Commercial Linux	1.1		x86 PC	Andrew Warkentin
Red Hat Linux	Red Hat Linux	3.0.3	Minimal	Archimedes/RiscPC and compatibles
Red Hat Linux	Red Hat Linux	6.0		x86 PC	Andrew Warkentin
Red Hat Linux	Red Hat Linux	6.2	Rescue system	x86 PC
Redox	Redox	0.6.0		x86 PC
Regional Assembler demo	Regional Assembler demo			IBM 650	Roberto Sancho Villa
Replenished Basic R.C	Replenished Basic R.C for MZ-80K			MZ-80K/80C/80A/700/800/1500 family
Research Unix (modified version provided by Torsten Hippe, origin unknown)	Research Unix	Seventh Edition (from Torsten Hippe)		PDP-11 (Unibus/Qbus-based)	Torsten Hippe	Link
Retro UNIX	Retro UNIX	386 v1.2		x86 PC
Retro UNIX	Retro UNIX	8086 v1 (2016-03-05)		x86 PC
RISC iX	RISC iX	1.2.1c		Archimedes/RiscPC and compatibles		Link
RISC OS	Arthur	0.30		Archimedes/RiscPC and compatibles
RISC OS	Arthur	1.20		Archimedes/RiscPC and compatibles
RISC OS	RISC OS	2.01		Archimedes/RiscPC and compatibles	Andrew Warkentin
RISC OS	RISC OS	3.11	Full system (universal boot installed)	Archimedes/RiscPC and compatibles	Andrew Warkentin
RISC OS	RISC OS	3.11	Minimal (Old boot)	Archimedes/RiscPC and compatibles	Andrew Warkentin
RISC OS	RISC OS	3.71		Archimedes/RiscPC and compatibles		Link
RISC OS	RISC OS	5.27 Direct		Archimedes/RiscPC and compatibles		Link
RL-H1000 OS	RL-H1000 OS			Panasonic HHC (6502-based)
RM/COS	RM/COS	2.4.03		TRS-80 Model II/12/16/6000
RMoX	RMoX	0.1.3		x86 PC
RMoX	RMoX	0.1.6		x86 PC
Roadrunner	Roadrunner	0.8.16		x86 PC
Robotron SCP	SCP for A5105	2.0		BIC A5105
Robotron SCP	SCP for PC1715	0006		PC1715
Rosanne	Rosanne	1.12		PcW16
RSTS	RSTS/E	7.0-07	Full system (Project Delta)	PDP-11 (Unibus/Qbus-based)		Link
RSTS	RSTS/E	7.0-07	Minimal system (llama)	PDP-11 (Unibus/Qbus-based)		Link
RSTS	RSTS/E	9.6-11		PDP-11 (Unibus/Qbus-based)
RSX-11D	RSX-11D	06.2		PDP-11 (Unibus/Qbus-based)	Andrew Warkentin
RSX-11D	RSX-11D	4A		PDP-11 (Unibus/Qbus-based)		Link
RSX-11M	RSX-11M	3.1		PDP-11 (Unibus/Qbus-based)
RSX-11M	RSX-11M	3.2		PDP-11 (Unibus/Qbus-based)
RSX-11M	RSX-11M	4.2		PDP-11 (Unibus/Qbus-based)
RSX-11M+	RSX-11M+	2.1		PDP-11 (Unibus/Qbus-based)
RSX-11M+	RSX-11M+	4.4		PDP-11 (Unibus/Qbus-based)
RSX-15	XVM/RSX	1B		PDP-15	Andrew Warkentin	Link
RSX180	RSX180	6.26		P112		Link
RT-11	RT-11	01-15		PDP-11 (Unibus/Qbus-based)
RT-11	RT-11	02C-02		PDP-11 (Unibus/Qbus-based)
RT-11	RT-11	03B-00		PDP-11 (Unibus/Qbus-based)
RT-11	RT-11	4.0G		PDP-11 (Unibus/Qbus-based)		Link
RT-11	RT-11	5.3		PDP-11 (Unibus/Qbus-based)		Link
RT-11	RT-11	5.3	With TSX-PLUS 5.1B	PDP-11 (Unibus/Qbus-based)
RT-11	RT-11 for PRO-3x0	5.3		PRO-3xx	Tarik Isani	Link
RT-11 for Nemiga	RT-11 for Nemiga	5.0		Nemiga
RT-11 for Soyuz-Neon	RT-11 for Soyuz-Neon	5.4		Soyuz-Neon PK-11/16
RT-11 for UKNC	RT-11 for UKNC	5.0		UKNC (MS 0511)
RT-11 for UKNC	RT-11 for UKNC	5.1		UKNC (MS 0511)
RT-11 for UKNC	RT-11 for UKNC	5.2		UKNC (MS 0511)
RT-11 for UKNC	RT-11 for UKNC	5.3		UKNC (MS 0511)
RT-11 for UKNC	RT-11 for UKNC	5.4		UKNC (MS 0511)
RT-11 for UKNC	RT-11 for UKNC	5.7		UKNC (MS 0511)
RTE-6/VM	RTE-6/VM	2340		HP 21xx/1000/2000
RTE-6/VM	RTE-6/VM	2540		HP 21xx/1000/2000
RTE-6/VM	RTE-6/VM	4010		HP 21xx/1000/2000
RTE-6/VM	RTE-6/VM	6200		HP 21xx/1000/2000	Ken Cornetet, Roberto Sancho Villa
RTE-B	RTE-B	Revision B		HP 21xx/1000/2000	Roberto Sancho Villa
RTE-C	RTE-II	29101 Revision C		HP 21xx/1000/2000	Roberto Sancho Villa
RTE-FH/MH (“RTE-I”)	RTE-FH (“RTE-I”)	Product # 29016		HP 21xx/1000/2000	Roberto Sancho Villa
RTE-FH/MH (“RTE-I”)	RTE-MH (“RTE-I”)	Product # 29016		HP 21xx/1000/2000	Roberto Sancho Villa
RTE-II/III	RTE-II	Revision 2440		HP 21xx/1000/2000	J. David Bryan, Roberto Sancho Villa
RTE-II/III	RTE-III	Revision 1926		HP 21xx/1000/2000	Roberto Sancho Villa
RTE-IV/IVB	RTE-IV	Revision 2013		HP 21xx/1000/2000	Roberto Sancho Villa
RTE-IV/IVB	RTE-IVB	Revision 5010		HP 21xx/1000/2000		Link
RTEMS	RTEMS		Demo programs	x86 PC
RTOS-UH	RTOS-UH	7.9-P		Atari ST/TT/Falcon
RxDOS	RxDOS	7.2 beta		x86 PC
S-OS	S-OS SWORD for SMC-777	2.0		SMC-70/SMC-777
S-OS	S-OS SWORD for SMC-777	2.2		SMC-70/SMC-777
S-OS	S-OS Sword for X1	1.0?		X1
S/370 Sample OS	S/370 Sample OS	2.00		System/360 and compatible
S5-DOS/MT	FlexOS	2.3	COROS LS-B 4.01	x86 PC	gorplop	Link
SAMDOS	SAMDOS	2.0		SAM Coupé
Sanos	Sanos	1.3.3.0		x86 PC	Andrew Warkentin
SC-3000 Disk BASIC	SC-3000 Disk BASIC	1.0p		SG-1000/SC-3000
SCELBI 8008 BASIC (MOD8 port)	SCELBI 8008 BASIC (MOD8 port)			MOD8
Scheme A	Scheme A			Ferranti Mark I	Roberto Sancho Villa
Scheme B	Scheme B			Ferranti Mark I	Roberto Sancho Villa
Scheme C (a.k.a. TELEINPUT)	Scheme C			Ferranti Mark I	Roberto Sancho Villa
Scheme T	Scheme T			Ferranti Mark I	Roberto Sancho Villa
SchilliX	SchilliX	17 (Solaris 11)		x86 PC	Andrew Warkentin
SCO UNIX System V R3.2	OpenServer (SCO UNIX System V R3.2)	5.0.7		x86 PC	Andrew Warkentin
SCO UNIX System V R3.2	SCO UNIX System V R3.2	4.0		x86 PC	Andrew Warkentin
SCO UNIX System V R3.2	SCO UNIX System V R3.2 (Open Server/Open Desktop)	4.2		x86 PC	Andrew Warkentin
SCO XENIX System V	SCO XENIX System V/386	2.3.4		x86 PC	Retrogatto	Link
SCO XENIX System V	SCO XENIX System V/8086	2.1.3		x86 PC	Hampa Hug	Link
SCOPE/Hustler	SCOPE/Hustler	400A		CDC 6x00/Cyber 70/Cyber 170/Cyber 180		Link
SEDORIC	SEDORIC	1.0		Oric machines (inc. clones)
SEDORIC	SEDORIC	2.1		Oric machines (inc. clones)
SEDORIC	SEDORIC	3.0		Oric machines (inc. clones)
SerenityOS	SerenityOS	1.0.g12edbb5		x86 PC	Andrew Warkentin
ShadOS	ShadOS	r0		Commodore 64
Sharp FDOS	Sharp FDOS SB-7010	1.0		MZ-80B/2x00 family
Sharp FDOS	Sharp FDOS SP-7015	1.0		MZ-80K/80C/80A/700/800/1500 family
Sharp LH5801-based pocket computer OSes	PC-1500 OS		PC-1500	Sharp LH5801-based pocket computers
Sharp LH5801-based pocket computer OSes	PC-1500 OS		PC-1500A	Sharp LH5801-based pocket computers
Sharp LH5801-based pocket computer OSes	PC-1500 OS		Tandy PC-2	Sharp LH5801-based pocket computers
Sharp LH5801-based pocket computer OSes	PC-1600 OS		PC-1600	Sharp LH5801-based pocket computers
Sharp MZ BASIC	Sharp BASIC MZ-2Z009E	1.0A		MZ-80K/80C/80A/700/800/1500 family
Sharp MZ BASIC	Sharp BASIC SA-6510 (MZ-80A)	1.0?		MZ-80K/80C/80A/700/800/1500 family
Sharp MZ BASIC	Sharp BASIC SB-6510	1.0		MZ-80B/2x00 family
Sharp MZ BASIC	Sharp BASIC SB-6511	1.0		MZ-80B/2x00 family
Sharp MZ BASIC	Sharp BASIC SB-6610	1.0		MZ-80B/2x00 family
Sharp Personal CP/M for MZ-2500 (MZ-6Z001)	Sharp Personal CP/M for MZ-2500 (MZ-6Z001)	1.0a		MZ-80B/2x00 family
Sharp Personal CP/M for MZ-700	Sharp Personal CP/M for MZ-700	1.0		MZ-80K/80C/80A/700/800/1500 family
Sharp Personal CP/M for MZ-800	Sharp Personal CP/M for MZ-800	1.0		MZ-80K/80C/80A/700/800/1500 family
Sharp SC61860-based pocket computer OSes	PC-1245 OS		MC-2200	Sharp ESR-H (SC61860)-based pocket computers
Sharp SC61860-based pocket computer OSes	PC-1245 OS		PC-1245	Sharp ESR-H (SC61860)-based pocket computers
Sharp SC61860-based pocket computer OSes	PC-125x OS		PC-1250	Sharp ESR-H (SC61860)-based pocket computers
Sharp SC61860-based pocket computer OSes	PC-125x OS		PC-1251	Sharp ESR-H (SC61860)-based pocket computers
Sharp SC61860-based pocket computer OSes	PC-125x OS		PC-1251H	Sharp ESR-H (SC61860)-based pocket computers
Sharp SC61860-based pocket computer OSes	PC-125x OS		PC-1253	Sharp ESR-H (SC61860)-based pocket computers
Sharp SC61860-based pocket computer OSes	PC-125x OS		PC-1255	Sharp ESR-H (SC61860)-based pocket computers
Sharp SC61860-based pocket computer OSes	PC-125x OS		Tandy PC-3	Sharp ESR-H (SC61860)-based pocket computers
Sharp SC61860-based pocket computer OSes	PC-125x OS		Tandy PC-3 (4k)	Sharp ESR-H (SC61860)-based pocket computers
Sharp SC61860-based pocket computer OSes	PC-126x OS		PC-1260	Sharp ESR-H (SC61860)-based pocket computers
Sharp SC61860-based pocket computer OSes	PC-126x OS		PC-1261	Sharp ESR-H (SC61860)-based pocket computers
Sharp SC61860-based pocket computer OSes	PC-126x OS		PC-1262	Sharp ESR-H (SC61860)-based pocket computers
Sharp SC61860-based pocket computer OSes	PC-128x OS		PC-1280	Sharp ESR-H (SC61860)-based pocket computers
Sharp SC61860-based pocket computer OSes	PC-1401 OS		PC-1401	Sharp ESR-H (SC61860)-based pocket computers
Sharp SC61860-based pocket computer OSes	PC-1401 OS		PC-1402	Sharp ESR-H (SC61860)-based pocket computers
Sharp SC61860-based pocket computer OSes	PC-1403 OS		PC-1403	Sharp ESR-H (SC61860)-based pocket computers
Sharp SC61860-based pocket computer OSes	PC-1403 OS		PC-1403H	Sharp ESR-H (SC61860)-based pocket computers
Sharp SC61860-based pocket computer OSes	PC-1421 OS			Sharp ESR-H (SC61860)-based pocket computers
Sharp SC61860-based pocket computer OSes	PC-1425 OS			Sharp ESR-H (SC61860)-based pocket computers
Sharp SC61860-based pocket computer OSes	PC-1450 OS			Sharp ESR-H (SC61860)-based pocket computers
Sharp SC61860-based pocket computer OSes	PC-1475 OS			Sharp ESR-H (SC61860)-based pocket computers
Sharp-HuBASIC	Sharp-HuBASIC for X1	CZ-8FB01 V1.0		X1
SILLIAC software collection	SILLIAC software collection			SILLIAC
Sinclair QDOS	Sinclair QDOS	1.10		Sinclair QL family
SINIX (PC-X)	SINIX (PC-X)	1.0		PC-X/PC-D	Andrew Warkentin
SINIX (PC-X)	SINIX (PC-X)	1.2		PC-X/PC-D	Andrew Warkentin
SINIX-Z	SINIX-Z	5.42		x86 PC	Plamen Mihaylov, vlad557776
SINTRAN III	SINTRAN III	L		NORD-1/5/10/100/50/500/5000 family
SITS	SITS	119		PDP-11 (Unibus/Qbus-based)	Lars Brinkhoff	Link
SK*DOS/68K	SK*DOS/68K for PT68K	3.3		PT68K
SkyOS	SkyOS	3.98		x86 PC	Andrew Warkentin
SkyOS	SkyOS	5.0.0 Beta 6947		x86 PC	Andrew Warkentin
Slackware	Slackware	1.1.2		x86 PC	Andrew Warkentin
Slackware	Slackware	3.0		x86 PC	Andrew Warkentin
SMC-777 booter games collection	SMC-777 booter games collection			SMC-70/SMC-777
SMC-777 System (Filer)	SMC-777 System (Filer)	1.0j		SMC-70/SMC-777
SMC-777 System (Filer)	SMC-777 System (Filer)	1.1j		SMC-70/SMC-777
SMC-777 System (Filer)	SMC-777 System (Filer)	1.2j		SMC-70/SMC-777
SMM	SMM	4.0-2		CDC 6x00/Cyber 70/Cyber 170/Cyber 180
SMSQ/E	SMSQ/E	3.18	QPC2 demo	Sinclair QL family
SMSQ/E	SMSQ/E	3.36	QL/E (shares disk images with Minerva 1.98 QL/E)	Sinclair QL family		Link
SO2 Regional Assembler	SO2 Regional Assembler demo			IBM 701	Roberto Sancho Villa
SOAP II	SOAP II demo			IBM 650	Roberto Sancho Villa
Softlanding Linux System	Softlanding Linux System	1.0		x86 PC
Solar OS	Solar OS	0.097		x86 PC
SOLO	SOLO			PDP-11 (Unibus/Qbus-based)
SOLOS	SOLOS			SOL-10/20/PC	Jim Battle	Link
SORA	SORA	0.0.1199		x86 PC
SORD FDDOS	SORD M20/M23 FDDOS	23H		SORD M20/M23
SOS	SOS	1.1	Apple /// Demos	Apple III
SOS	SOS	1.1	System Utilities	Apple III
SOS	SOS	1.3	System Utilities	Apple III
Spacewar for PDP-1	Spacewar for PDP-1			PDP-1
SpareMiNT	SpareMiNT	2006-04-22		Atari ST/TT/Falcon	Andrew Warkentin
SpartaDOS	SpartaDOS	3.3a	Base	Atari 8-bit computers
SpartaDOS	SpartaDOS	3.3a	With ATOS GUI	Atari 8-bit computers
SpartaDOS	SpartaDOS X	4.22		Atari 8-bit computers
Specialist monitor	Specialist monitor			Specialist (original)
Spoon	Spoon	2004-06-16		x86 PC
Spoon	Spoon	2006-07-14		x86 PC
Sprite	Sprite	KS.390		DEC MIPS machines (DECstation/DECsystem)
Sprite OS	Sprite OS	1.3		Agat
Sprite OS	Sprite OS	2.5		Agat
SqueakNOS	SqueakNOS	3.8		x86 PC
SSEM software collection	SSEM software collection			Small Scale Experimental Machine (Baby)
ST-Mint	ST-Mint	1.4		Atari ST/TT/Falcon		Link
STRATSED	STRATSED	2.0		Oric machines (inc. clones)
Sun Solaris	Solaris/SPARC	2.3		SPARC machines (Sun-4)	Andrew Warkentin
Sun Solaris	Solaris/SPARC	2.4		SPARC machines (Sun-4)	Andrew Warkentin
Sun Solaris	Solaris/SPARC	9 (s9_58shwpl3)		SPARC machines (Sun-4)
Sun Solaris	Solaris/x86	9		x86 PC	Andrew Warkentin
SunOS	Sun UNIX 4.2	3.2		Sun-2 series	Andrew Warkentin
SunOS	Sun UNIX 4.2	3.5		Sun-3 series	Andrew Warkentin
SunOS	SunOS	4.0.3		Sun-2 series	Andrew Warkentin
SunOS	SunOS	4.1.1		Sun-3 series	Andrew Warkentin
SunOS	SunOS	4.1.4		SPARC machines (Sun-4)	Andrew Warkentin
Super DOS	Super DOS	2.2		Oric machines (inc. clones)
Super Job	Super Job			Apollo Guidance Computer
Super-80 DOS	Super-80 DOS	00.22		Super 80
SuperSOAP	SuperSOAP demo			IBM 650	Roberto Sancho Villa
Supra 64 (a.k.a. Workbench)	Supra 64 (a.k.a. Workbench)	2.1		Commodore 64
Sura MDOS	Sura MDOS	1.0		PK8000 (Sura/Vesta/Hobby/Karat)
SUSE Linux Enterprise Server	SUSE Linux Enterprise Server for System Z	11		System/360 and compatible	Andrew Warkentin
SVS-OS	SVS-OS	3.2		Commodore Plus/4 series
SX-WINDOW	SX-WINDOW	3.1		X68000 family
Syllable	Syllable	0.5.2		x86 PC	Andrew Warkentin
Syllable	Syllable	0.6.2		x86 PC	Andrew Warkentin
Syllable	Syllable	0.6.6		x86 PC	Andrew Warkentin
SymbOS	SymbOS	1.0		CPC/Aleste
SymbOS	SymbOS	1.0 Beta		CPC/Aleste
SymbOS	SymbOS	3.0 (Enterprise)		Enterprise 64/128		Link
SymbOS	SymbOS (MSX version)	1.1		MSX
System/3 SCP	SCP for System/3 Model 10	V15M0		System/3		Link
T-DOS	T-DOS	4.5		Adam/ColecoVision
T.R.A.N. DOS	T.R.A.N. DOS	3-2		Oric machines (inc. clones)
Tabos	Tabos	0.2.6		x86 PC
TAMU Linux	TAMU Linux	1.0		x86 PC	Andrew Warkentin
Tandy CP/M Plus for TRS-80 Model II	Tandy CP/M Plus for TRS-80 Model II	1.0.0 (DRI version 3.0)		TRS-80 Model II/12/16/6000
TAP34 ROM OS	TAP34 ROM OS			TAP-34 (Z80-based)
TCP/M for Argo	TCP/M for Argo	2.2		Argo FV-6511
TCP/M for Yunior	TCP/M for Yunior	2.2		Yunior FV-6506
Tektronix 4400 UniFLEX	Tektronix 4400 UniFLEX	2.0		Tektronix 4400 series	Adam Billyard
TempleOS	J Operating System	051231		x86 PC
TempleOS	TempleOS	5.03		x86 PC	Andrew Warkentin
TF-DOS	TF-DOS	2.1		X1
TF-DOS	TF-DOS for MZ-2000	2.0		MZ-80B/2x00 family
TF-DOS	TF-DOS for MZ-2000	2.1		MZ-80B/2x00 family
The Möbius	The Möbius	2004-03-14		x86 PC
Thix	Thix	0.3.7		x86 PC	Andrew Warkentin
TI 68K graphing calculator OS	TI-89 OS	1.05		TI 68k-based graphing calculators (TI-89/92/Voyage)
TI 68K graphing calculator OS	TI-89 OS	2.09		TI 68k-based graphing calculators (TI-89/92/Voyage)
TI 68K graphing calculator OS	TI-89 Titanium OS	3.10		TI 68k-based graphing calculators (TI-89/92/Voyage)
TI 68K graphing calculator OS	TI-92 OS	1.12		TI 68k-based graphing calculators (TI-89/92/Voyage)
TI 68K graphing calculator OS	TI-92 OS	2.1		TI 68k-based graphing calculators (TI-89/92/Voyage)
TI 68K graphing calculator OS	TI-92+ OS	1.05		TI 68k-based graphing calculators (TI-89/92/Voyage)
TI 68K graphing calculator OS	TI-92+ OS	2.09		TI 68k-based graphing calculators (TI-89/92/Voyage)
TI Explorer ZetaLisp System	TI Explorer ZetaLisp System	4.1		Explorer		Link
TI Microprocessor Pascal	TI Microprocessor Pascal	2.1		TI 990	Dave Pitts	Link
TI Z80 graphing calculator OSes	TI-81 OS	1.8k		TI Z80-based graphing calculators
TI Z80 graphing calculator OSes	TI-81 OS	2.0V		TI Z80-based graphing calculators
TI Z80 graphing calculator OSes	TI-82 OS	1.9		TI Z80-based graphing calculators
TI Z80 graphing calculator OSes	TI-83+ OS	1.16		TI Z80-based graphing calculators
TI Z80 graphing calculator OSes	TI-84+ OS	2.55MP		TI Z80-based graphing calculators
TI Z80 graphing calculator OSes	TI-86 OS	1.6		TI Z80-based graphing calculators
TI-57 OS	TI-57 OS			TI-57
TI-58C OS	TI-58C OS			TI-58/59
TI-59 OS	TI-59 OS			TI-58/59
TI-59 OS	TI-59C OS			TI-58/59
TI-74 BASIC	TI-74 BASIC			CC-40/TI-74
TIA-MC-1 games collection	TIA-MC-1 games collection			TIA-MC-1
TIKO	TIKO	4.01		Tiki-100
ToAruOS	ToAruOS	2.00		x86 PC
TomsRtBt	TomsRtBt	2.0.103		x86 PC
TOPS-10	TOPS-10	7.03	Full (VNW)	PDP-6/PDP-10 family
TOPS-10	TOPS-10	7.03	Minimal	PDP-6/PDP-10 family
TOPS-10	TOPS-10	7.04		PDP-6/PDP-10 family		Link
TOPS-20	TOPS-20	4.1		PDP-6/PDP-10 family	Andrew Warkentin
TOPS-20	TOPS-20	7.1 Panda 2006-06-16		PDP-6/PDP-10 family		Link
Torch Triple X/Quad X UniPlus+	Torch UniPlus+ SVR2	2.11		Triple X/Quad X
TOS	TOS	2.06	Games	Atari ST/TT/Falcon
TOS	TOS	2.06	With Minix 1.5	Atari ST/TT/Falcon		Link
TOS	TOS	4.04		Atari ST/TT/Falcon
TOS/360	TOS/360	R14		System/360 and compatible	Richard Cornwell, Roberto Sancho Villa	Link
TOS/M	TOS/M	1.0		PC1715
Toshiba MS-DOS	Toshiba MS-DOS	2.11	With PCVMS 1.08	x86 PC	Andrew Warkentin
Toshiba MS-DOS	Toshiba MS-DOS	2.11	With Windows 1.0 Alpha	x86 PC	Andrew Warkentin
Toshiba MS-DOS	Toshiba MS-DOS	2.11	With Windows 1.0 DR5	x86 PC	Andrew Warkentin
TownsOS	TownsOS	2.1 L51		FM TOWNS/FMR family
TPE Monitor	TPE Monitor	B01		NORD-1/5/10/100/50/500/5000 family
TPM	TPM	2.28f		QC-10/QX-10/QX-16
TPM	TPM	2.44		QC-10/QX-10/QX-16
TPM	TPM	3.60 (w/Valdocs 2)		QC-10/QX-10/QX-16
TriangleOS	TriangleOS	0.0.3		x86 PC
Triangular OS	Triangular OS	1.01		PET/CBM series
TROPIX	TROPIX	4.8.0		x86 PC	Andrew Warkentin
TRS-XENIX System III	TRS-XENIX	03.03.00 (Microsoft version 3.0)		TRS-80 Model II/12/16/6000		Link
TRS-XENIX V7	TRS-XENIX	01.03.05 (Microsoft version 2.3A)		TRS-80 Model II/12/16/6000		Link
TRSDOS 6	TRSDOS	6.2.0	With Model 4P DeskMate 1.0	TRS-80 Model I/III/4
TRSDOS for Model I	TRSDOS	2.3		TRS-80 Model I/III/4
TRSDOS Model III	TRSDOS Model III	1.3		TRS-80 Model I/III/4
TRSDOS-II	TRS-80 Model II TRSDOS	1.2		TRS-80 Model II/12/16/6000
TRSDOS-II	TRS-80 Model II TRSDOS	2.0		TRS-80 Model II/12/16/6000
TRSDOS-II	TRS-80 Model II TRSDOS	2.0.1HS		TRS-80 Model II/12/16/6000
TRSDOS-II	TRS-80 Model II TRSDOS	2.0a		TRS-80 Model II/12/16/6000
TRSDOS-II	TRS-80 Model II TRSDOS	2.0b		TRS-80 Model II/12/16/6000
TRSDOS-II	TRS-80 Model II TRSDOS	2.0d		TRS-80 Model II/12/16/6000
TRSDOS-II	TRSDOS-II	4.2.0		TRS-80 Model II/12/16/6000
TRSDOS-II	TRSDOS-II	4.2.5		TRS-80 Model II/12/16/6000
TRSDOS-II	TRSDOS-II	4.2.6		TRS-80 Model II/12/16/6000
TRSDOS-II	TRSDOS-II	4.3.11		TRS-80 Model II/12/16/6000
TRSDOS-II	TRSDOS-II	4.4.0		TRS-80 Model II/12/16/6000
TRSDOS-II	TRSDOS-II/TRSDOS-16	4.1		TRS-80 Model II/12/16/6000
TSS-8	TSS-8	8.24		PDP-5/PDP-8 family	John Wilson
TSS/360	TSS/370	3		System/360 and compatible	Jay Maynard
TSX-32	TSX-32	4.26 Demo		x86 PC	Andrew Warkentin
TSX-PLUS	TSX-PLUS	5.1B		PDP-11 (Unibus/Qbus-based)
TUD:OS	TUD:OS			x86 PC
TurboDOS for Altair (from Peter Schorn)	TurboDOS for Altair	1.22P		Altair		Link
TX-0 Mouse Maze Game	TX-0 Mouse Maze Game			TX-0
TX-0 Tic-Tac-Toe	TX-0 Tic-Tac-Toe			TX-0
TX990/TXDS	TX990/TXDS	2.4.0	ASR 733	TI 990	Dave Pitts	Link
TX990/TXDS	TX990/TXDS	2.4.0	VT100 support	TI 990	Dave Pitts	Link
UA SAP	UA SAP			IBM 704x/709x	Roberto Sancho Villa
UBC/MLAB Research Unix	UBC/MLAB Research Unix	Sixth Edition		PDP-11 (Unibus/Qbus-based)	Tim Shoppa	Link
Ubuntu	Ubuntu	11.04		x86 PC	Andrew Warkentin
Ubuntu	Ubuntu	4.10		x86 PC	Andrew Warkentin
UDOS	UDOS	3.1		P8000
UFD-DOS	UFD-DOS	6.19		ABC 80/800 series
UKNC booter software collection	UKNC booter software collection			UKNC (MS 0511)
ULTRIX-11	ULTRIX-11	2.0		PDP-11 (Unibus/Qbus-based)	Andrew Warkentin
ULTRIX-11	ULTRIX-11	3.0		PDP-11 (Unibus/Qbus-based)	Andrew Warkentin
ULTRIX-11	ULTRIX-11	3.1		PDP-11 (Unibus/Qbus-based)	Andrew Warkentin
ULTRIX-32	ULTRIX-32	1.1		VAX	Andrew Warkentin
ULTRIX-32	ULTRIX-32	2.0		VAX	Andrew Warkentin
ULTRIX-32	ULTRIX-32	3.1		VAX	Andrew Warkentin
ULTRIX-32	ULTRIX-32m	1.0		VAX	Andrew Warkentin
ULTRIX-32	ULTRIX-32m	1.2		VAX	Andrew Warkentin
ULTRIX-32	ULTRIX/RISC	4.5		DEC MIPS machines (DECstation/DECsystem)	Andrew Warkentin
ULTRIX-32	ULTRIX/VAX	4.0		VAX	Andrew Warkentin
uMZix	uMZix	2012-12-02		MZ-80K/80C/80A/700/800/1500 family
UNICOS	UNICOS	10.0.0.2		Cray PVP machines	Andrew Warkentin, Jason Stevens (neozeed)	Link
UNICOS	UNICOS	10.0.1.2		Cray PVP machines	Andrew Warkentin, Jason Stevens (neozeed)	Link
UniDOS	UniDOS	3.00		Pyldin-601
UniFLEX/6809	UniFLEX for SWTPC 6809	3.14A		SWTPC 6809	Michael Evenson	Link
UniPlus+ for Lisa	UniPlus for Lisa	1.4		Lisa	Andrew Warkentin
Unite	Unite	0.11		x86 PC		Link
UNIVAC 1219 demo software collection	UNIVAC 1219 demo software collection			UNIVAC 418/1218/1219
UNIVAC 494 Minimum OS	UNIVAC 494 Minimum OS	0.5		UNIVAC 494		Link
Unix 128	Unix 128	3.11		Commodore 128	Andrew Warkentin
UNIX/32V	UNIX/32V			VAX		Link
Unix/V7M	Unix/V7M	2.1		PDP-11 (Unibus/Qbus-based)	Andrew Warkentin
UnixLite	UnixLite	2006-07-08		x86 PC
UnixWare	UnixWare	1.0		x86 PC	Antoni Sawicki (tenox), Plamen Mihaylov
UnixWare	UnixWare	2.03		x86 PC
UnixWare	UnixWare	7.1.3		x86 PC	Andrew Warkentin
UNOS	BOSS/IX	7.5B*22		MAI Basic/Four 68k machines	Armin Diehl, ajfa
UNOS	UNOS for TRS-80 Model 16	1982-10-29		TRS-80 Model II/12/16/6000
Unununium	Unununium	0.3 (CVS snapshot, date unknown)		x86 PC
UTS	UTS	1.0		System/360 and compatible	moshix	Link
UTX/32	UTX/32	2.1B		SEL/Gould 32-bit series	James C. Bevier	Link
UX/RT alpha demo	UX/RT demo	0.0.1		x86 PC
UZI180	UZI180	1.6.2		P112		Link
UZIX	UZIX	0.1.0		MSX
UZIX	UZIX	0.2.1		MSX	Andrew Warkentin
V7/x86	V7/x86	0.8a		x86 PC
Vanadium OS (a.k.a. newsys)	Nameless OS (newsys)	Alpha 8		x86 PC
Vanadium OS (a.k.a. newsys)	Vanadium OS	1.4		x86 PC
Vector-06c booter software collection	Vector-06c booter software collection			Vector-06c
VENIX/86	VENIX/86	2.1		x86 PC
VENIX/PRO	VENIX/PRO	R1.0		PRO-3xx	Andrew Warkentin
VENIX/PRO	VENIX/PRO	R2.0		PRO-3xx	Tarik Isani	Link
Virtual AGC validation suite	Virtual AGC validation suite			Apollo Guidance Computer
Visi On	Visi On	1.0		x86 PC		Link
Visopsys	Visopsys	0.62		x86 PC	Andrew Warkentin
VM	VM/370	Community Edition R1V1.2 (based on IBM Release 6)		System/360 and compatible		Link
VM	VM/370	R6		System/360 and compatible
VMS	MicroVMS	4.7		VAX
VMS	OpenVMS Alpha	7.3-1		DEC Alpha machines
VMS	OpenVMS VAX	6.2		VAX
VMS	VAX/VMS	1.00		VAX
VMS	VAX/VMS	2.0		VAX
VMS	VAX/VMS	3.0		VAX
VMS	VAX/VMS	4.7		VAX
VMS	VAX/VMS	5.5		VAX
VSTa	VSTa	1.6.8		x86 PC	Andrew Warkentin
VT-OS	VT-OS	1.3.01		Helio
VT-OS	VT-OS	1.3.02		Helio
WAITS	WAITS	6.17/K		PDP-6/PDP-10 family		Link
WAITS	WAITS	7.01/C		PDP-6/PDP-10 family		Link
Wang 2200 OS (BASIC-1)	Wang 2200B OS (BASIC-1)			Wang 2200	Jim Battle	Link
Wang 2200 OS (BASIC-1)	Wang 2200T OS (BASIC-1)			Wang 2200	Jim Battle	Link
Wang 2200MVP OS (“BASBOL” Multi-User BASIC-3/COBOL)	Wang 2200MVP OS (“BASBOL” Multi-User BASIC-3/COBOL)	droz05		Wang 2200	Jim Battle	Link
Wang 2200MVP OS (“BASBOL” Multi-User BASIC-3/COBOL)	Wang 2200MVP OS (“BASBOL” Multi-User BASIC-3/COBOL)	droz08		Wang 2200	Jim Battle	Link
Wang 2200MVP OS (Multi-User BASIC-2)	Wang 2200MVP OS (Multi-User BASIC-2)	3.4		Wang 2200	Jim Battle	Link
Wang 2200MVP OS (Multi-User BASIC-2)	Wang 2200MVP OS (Multi-User BASIC-2)	3.5		Wang 2200	Jim Battle	Link
Wang 2200VP OS (BASIC-2)	Wang 2200VP OS (BASIC-2)	1.8		Wang 2200	Jim Battle	Link
Wang 2200VP OS (BASIC-2)	Wang 2200VP OS (BASIC-2)	2.3		Wang 2200	Jim Battle	Link
Wang 2200VP OS (BASIC-2)	Wang 2200VP OS (BASIC-2)	2.4		Wang 2200	Jim Battle	Link
Wang 3300 BASIC	Wang 3300 BASIC			Wang 3300	Jim Battle	Link
WEGA	WEGA	3.1		P8000
Wheels for C64	Wheels for C64	2.1		Commodore 64	Andrew Warkentin
Whitix	Whitix	0.1		x86 PC
Whitix	Whitix	0.2alpha1		x86 PC
Whitix	Whitix	0.2beta1		x86 PC
Windows 9x	Windows 95	4.00.1111 (OSR2, a.k.a. 4.00.950B, inc. MS-DOS 7.1)		x86 PC	Andrew Warkentin
Windows 9x	Windows 98	4.00.2222A (SE, inc. MS-DOS 7.1)		x86 PC	Andrew Warkentin
Windows 9x	Windows Chicago (95 beta)	4.00.122 (inc. MS-DOS 7.0)		x86 PC	Andrew Warkentin
Windows 9x	Windows Chicago (95 beta)	4.00.189 (inc. MS-DOS 7.0)		x86 PC	Andrew Warkentin
Windows 9x	Windows Chicago (95 beta)	4.00.224 (inc. MS-DOS 7.0)		x86 PC	Andrew Warkentin
Windows 9x	Windows Chicago (95 beta)	4.00.347 (inc. MS-DOS 7.0)		x86 PC	Andrew Warkentin
Windows 9x	Windows Chicago (95 beta)	4.00.58s (inc. MS-DOS 7.0)		x86 PC	Andrew Warkentin
Windows 9x	Windows Chicago (95 beta)	4.00.73g (inc. MS-DOS 7.0)		x86 PC	Andrew Warkentin
Windows 9x	Windows Chicago (95 beta)	4.00.81 (inc. MS-DOS 7.0)		x86 PC	Andrew Warkentin
Windows 9x	Windows Chicago (95 beta)	4.00.89e (inc. MS-DOS 7.0)		x86 PC	Andrew Warkentin
Windows 9x	Windows Chicago (95 beta)	4.00.99 (inc. MS-DOS 7.0)		x86 PC	Andrew Warkentin
Windows 9x	Windows ME	4.90.3000 (inc. MS-DOS 8)		x86 PC	Andrew Warkentin
Windows 9x	Windows Memphis (98 beta)	4.10.1500 (inc. MS-DOS 7.1)		x86 PC	Andrew Warkentin
Windows 9x	Windows Millennium beta	4.90.2394 (inc. MS-DOS 8)		x86 PC	Andrew Warkentin
Windows 9x	Windows Nashville (abandoned “Windows 96” beta)	4.00.999 (inc. MS-DOS 7.0)		x86 PC	Andrew Warkentin
Windows CE	Windows CE for PC	5.0 (Build 1400)		x86 PC
Windows CE	Windows Embedded CE	6.0		Windows CE/Windows Mobile/Windows Phone devices (ARM-based)
Windows Mobile	Windows Mobile 2003 Second Edition (Pocket PC)	4.2.1088 Build 14342.5.0)		Windows CE/Windows Mobile/Windows Phone devices (ARM-based)
Windows Mobile	Windows Mobile 5.0 (Pocket PC Phone)	5.1.1700 (Build 14343.0.0.0)		Windows CE/Windows Mobile/Windows Phone devices (ARM-based)
Windows Mobile	Windows Mobile 6 Professional (Pocket PC Phone)	6 (CE OS 5.2.1235 Build 17740.0.2.0)		Windows CE/Windows Mobile/Windows Phone devices (ARM-based)
Windows Mobile	Windows Mobile 6 Standard (Smartphone)	6 (CE OS 5.2.1235 Build 17740.0.2.0)		Windows CE/Windows Mobile/Windows Phone devices (ARM-based)
Windows Mobile	Windows Mobile 6.1 Professional (Pocket PC Phone)	6.1.4 (CE OS 5.2.20757)		Windows CE/Windows Mobile/Windows Phone devices (ARM-based)
Windows Mobile	Windows Mobile 6.1 Standard (Smartphone)	6.1.4 (CE OS 5.2.20757)		Windows CE/Windows Mobile/Windows Phone devices (ARM-based)
Windows Mobile	Windows Mobile 6.5 Standard (Pocket PC Phone)	6.5 (CE OS 5.2.23090)		Windows CE/Windows Mobile/Windows Phone devices (ARM-based)
Windows Mobile	Windows Mobile 6.5 Standard (Smartphone)	6.5 (CE OS 5.2.23090)		Windows CE/Windows Mobile/Windows Phone devices (ARM-based)
WinFrame	WinFrame	1.8.403 (SP5B) (based on NT 3.51)		x86 PC	Andrew Warkentin
WiNGS	WiNGS	Fall 2004 (World of Commodore)		Commodore 64	Andrew Warkentin
Wollongong Research Unix	Wollongong Research Unix	6th Edition		Interdata/Perkin-Elmer 32-bit series		Link
Wollongong Research Unix	Wollongong Research Unix	7th Edition		Interdata/Perkin-Elmer 32-bit series		Link
Wyse System V/386	Wyse System V/386 Release 3.2	3.2.1a		x86 PC	Antoni Sawicki (tenox)
X-07 BASIC	X-07 BASIC			X-07
X-DOS	X-DOS	1.3a		X1
XENIX for Lisa	XENIX for Lisa	3.0		Lisa	Andrew Warkentin
Xenophilia GNU/Linux	Xenophilia GNU/Linux	0.1 (based on Debian 3.1)		x86 PC	Andrew Warkentin
Xinu	Xinu for UKNC	7.6		UKNC (MS 0511)
XL DOS	XL DOS	0.6		Oric machines (inc. clones)
XtalDOS	XtalDOS	0.x (specific versions unknown)		Einstein
XtalDOS	XtalDOS	1.11		Einstein
XtalDOS	XtalDOS	1.31		Einstein
XtalDOS	XtalDOS	2.02		Einstein
XtalDOS	XtalDOS	2.05		Einstein
xv6	xv6			x86 PC
XVM System Exerciser	XVM System Exerciser	7		PDP-15
xwoaf	xwoaf	0.2.0g		x86 PC
XXDP	XXDP	2.5		PDP-11 (Unibus/Qbus-based)
YAOSP	YAOSP	0.0.5		x86 PC
Yggdrasil Linux/GNU/X	Yggdrasil Linux/GNU/X	1992 Alpha Test Release		x86 PC	Andrew Warkentin
Yoctix	Yoctix	0.0.85		x86 PC
YuXing DOS	YuXing DOS	8.3		Famicom/NES and clones
YuXing DOS	YuXing DOS	9.0		Famicom/NES and clones
YuXing DOS	YuXing DOS	9.2		Famicom/NES and clones
Z80-RIO	Z80-RIO	2.2		MCZ/ZDS		Link
ZCN	ZCN	1.3		NC-100/NC-150/NC-200
Zeta	Zeta	1.5		x86 PC	Andrew Warkentin
ZUDOS	ZUDOS	0.1		System/360 and compatible
ZXVGS	ZXVGS	0.35		Sinclair ZX Spectrum and 100% clones
ZZSA	ZZSA		DOS/VS R34	System/360 and compatible
ZZSA	ZZSA		OS/360 MVT 21.8f (ASP)	System/360 and compatible
ZZSA	ZZSA		OS/360 MVT 21.8f (HASP)	System/360 and compatible
ZZSA	ZZSA		OS/VS2 MVS 3.8j	System/360 and compatible
μC/OS	μC/OS-II		LWIP Test	SkyEye paravirtualized ARM SBC
μC/OS	μC/OS-II		Serial Character Input Demo	SkyEye paravirtualized ARM SBC
μC/OS	μC/OS-II		Serial String Input Demo	SkyEye paravirtualized ARM SBC
μC/OS	μC/OS-II		Simple Loop/ISR Demo	SkyEye paravirtualized ARM SBC
μC/OS	μC/OS-II		Simple Shell Demo	SkyEye paravirtualized ARM SBC
μCLinux	μCLinux ARM Demo	2.4.17		SkyEye paravirtualized ARM SBC
μCLinux	μCLinux QEMU Coldfire demo			MCF5208EVB
μnOS	Symobi	1.2		x86 PC
μnOS	μnOS	0.98		x86 PC