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1012:Not Another Completely Heuristic Operating System
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553:Convergent Technologies Operating System
231:This list may not reflect recent changes
210:Discontinued Microsoft operating systems
1349:University of Michigan Executive System
387:Cambridge Distributed Computing System
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975:Multiple Console Time Sharing System
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162:Digital Research operating systems
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1287:Transaction Management eXecutive
186:Discontinued Linux distributions
910:Minerva (QDOS reimplementation)
470:Concurrent CP/M-86 with Windows
850:Interactive Application System
813:HP Multi-Programming Executive
429:Compatible Time-Sharing System
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1344:Universal Time-Sharing System
1275:Time Sharing Operating System
888:Livermore Time Sharing System
830:IBM Basic Programming Support
641:Dartmouth Time Sharing System
272:IBM Academic Operating System
697:EOS (8-bit operating system)
449:Concurrent CP/M with Windows
1270:THE multiprogramming system
1174:Rhapsody (operating system)
424:Coherent (operating system)
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1243:Sprite (operating system)
1041:Operating System Projects
781:GEORGE (operating system)
657:Digita (operating system)
414:Chippewa Operating System
1265:TENEX (operating system)
1090:Panos (operating system)
905:Michigan Terminal System
840:Idris (operating system)
1364:UNOS (operating system)
965:MTS system architecture
920:MNOS (operating system)
724:FLEX (operating system)
345:BBN Time-Sharing System
1430:Xerox Operating System
1307:TSS (operating system)
1208:SHARE Operating System
1002:NOS (operating system)
526:Concurrent DOS 386/MGE
313:ARX (operating system)
1466:Discontinued software
624:Cray Operating System
477:Concurrent CP/M-86/80
278:Access Linux Platform
1376:V (operating system)
442:Concurrent CP/M 8-16
1413:Wii system software
491:Concurrent DOS 8-16
456:Concurrent CP/M-68K
533:Concurrent DOS V60
519:Concurrent DOS 386
512:Concurrent DOS 286
498:Concurrent DOS 68K
463:Concurrent CP/M-86
1461:Operating systems
825:IBM 7090/94 IBSYS
547:Concurrent PC DOS
540:Concurrent DOS XM
505:Concurrent DOS 86
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915:MIPS RISC/os
629:Cromemco DOS
604:CP/M-86 Plus
340:Banyan VINES
308:Apple ProDOS
303:Apple Pascal
293:Ancient UNIX
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1324:UCSD Pascal
1223:Sintran III
1036:OpenSolaris
796:Apple GS/OS
214:(2 C, 17 P)
190:(1 C, 49 P)
1455:Categories
1302:Tru64 UNIX
1095:PC-MOS/386
1018:Novell DOS
835:IBM PC DOS
786:GM-NAA I/O
756:FlexOS 386
749:FlexOS 286
742:FlexOS 186
735:FlexOS 68K
719:Firefox OS
646:DesktopBSD
611:CP/M-86/80
404:CDC Kronos
365:BLIS/COBOL
288:Amiga Unix
146:(2 C, 2 P)
1238:Apple SOS
992:Newton OS
931:MP/M 8-16
900:Magic Cap
668:Domain/OS
618:CP/M-8000
576:CP/M Plus
569:CP/M 8-16
409:CDC SCOPE
323:Atari TOS
318:Atari DOS
298:Apple DOS
283:Acorn MOS
19:Contents
1386:VERSAdos
1354:UNIX/32V
1281:Towns OS
1156:SCP QDOS
997:NeXTSTEP
959:MP/M-286
845:IMAX 432
673:DOS Plus
663:DigitaOS
583:CP/M-68K
1442:Z80-RIO
1339:UniFLEX
1253:Symbian
1228:Siris 8
1213:SharpOS
1179:RISC iX
1106:PC-UX/V
1084:PalmDOS
1078:Palm OS
1024:NetWare
970:Multics
952:MP/M-86
945:MP/M-80
938:MP/M II
597:CP/M-85
590:CP/M-80
563:CP/M-86
399:CB UNIX
370:BOS/360
1381:VAXELN
1334:UNETix
1329:Ultrix
1297:TRSDOS
1292:TRIPOS
1233:SMSQ/E
1202:S5-DOS
1189:RSX-11
1184:RSTS/E
1138:PRIMOS
1133:Plurix
1007:NOS/VE
791:GNO/ME
775:GEMDOS
769:GeckOS
729:FlexOS
679:DR DOS
375:BSD/OS
254:386BSD
249:86-DOS
244:68K/OS
166:(48 P)
1425:Xenix
1312:TUNIS
1248:SunOS
1100:PC-UX
1066:OSF/1
707:Eumel
702:ETA10
685:DYNIX
651:DG/UX
393:CatOS
355:BESYS
1401:VSTa
1061:OS/7
1056:OS/4
1051:OS/2
925:MP/M
862:IRIX
558:CP/M
350:BeOS
266:A/UX
142:A/UX
239:0–9
31:0–9
26:Top
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36:A
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