Home›Systems›Status›DiscontinuedBrowse ByDiscontinuedThis dimension marks whether a computing system is still actively developed, discontinued or superseded. Wikipedia notes that "as of November 2025, Android is the most popular operating system, with a 38% market share," a ranking that shifts as some systems keep growing while others fall out of active use. Browsing by status separates systems still current from those no longer maintained.DiscontinuedConnectionsComments (0)Reader Challenges (0)DiscontinuedFilter Results253 entriesSystem ClassAllAnalog and Special-Purpose Computers (2)Atari Home Computers (2)Bletchley Park Codebreaking Machines (1)British ICL Mainframes (2)Burroughs and UNIVAC Mainframe Lineages (1)Classic Mac OS and Apple Systems (11)Commercial Mechanical Calculators (3)Commodore 8-bit Home Computers (3)Cray Research and Control Data Vector Supercomputers (11)DEC PDP and VAX Systems (1)DOS-Family Systems (18)Early Apple Personal Computers (2)Early Australian Computers (2)Early British Stored-Program Computers (5)Early Commercially Sold Computers (5)Early Japanese Computers (2)Early Massively Parallel Architectures (1)Early Personal and Portable Computers (3)Early Soviet Computers (1)Early Store-and-Forward Dial-Up Networks (1)Embedded and Real-Time Operating Systems (13)Ferranti Computers (2)First-Generation Vacuum-Tube Computers (4)General Electric and Honeywell Mainframe Lineage (1)Graphical and Unix Workstations (1)Harvard Mark Computers (3)Historic Network Operating Systems: NetWare and Banyan VINES (2)Home Computer Operating Systems (13)Home Computers of the Late 1970s and 1980s (4)IAS Machine-Derived Computers (5)IBM Early Business Computers (2)IBM Mainframe and Midrange Systems (3)IBM Supercomputers (5)Japanese Petascale Supercomputers (1)Mainframe and Historical Systems (25)Military and Defense Computers (1)Mobile and Handheld Operating Systems (8)Pre-Internet Packet-Switched Research Networks (4)Punched Card Calculators and Programmable Calculators (1)Research and Academic Operating Systems (25)Sinclair Home Computers (2)TRS-80 Family Computers (2)UNIVAC Line Computers (3)University and Research Laboratory Computers (3)Unix and Unix-Like Systems (32)Xerox PARC Computers (1)YearAll1694 (1)1820 (1)1873 (1)1936 (1)1937 (1)1938 (1)1940 (1)1941 (1)1943 (1)1944 (1)1945 (2)1947 (1)1948 (3)1949 (5)1950 (3)1951 (10)1952 (3)1953 (3)1954 (1)1955 (2)1956 (4)1957 (6)1958 (1)1959 (1)1960 (2)1961 (2)1962 (3)1964 (6)1965 (4)1966 (2)1967 (3)1968 (1)1969 (3)1970 (5)1972 (4)1974 (4)1975 (6)1976 (3)1977 (3)1978 (3)1979 (10)1980 (9)1981 (15)1982 (8)1983 (3)1984 (13)1985 (8)1986 (3)1987 (1)1988 (7)1989 (1)1990 (1)1991 (5)1992 (4)1993 (3)1994 (1)1995 (3)1996 (1)1997 (1)1998 (3)1999 (2)2003 (2)2004 (2)2006 (2)2008 (3)2011 (3)2012 (2)2013 (2)2018 (2)ACM AreaAllComputer Architecture (94)Computer Networking (5)Information Retrieval (1)Operating Systems (135)Programming Language Theory (1)GroupAllAnalog and Special-Purpose Computers (2)Atari Home Computers (2)Bletchley Park Codebreaking Machines (1)British ICL Mainframes (2)Burroughs and UNIVAC Mainframe Lineages (1)Classic Mac OS and Apple Systems (11)Commercial Mechanical Calculators (3)Commodore 8-bit Home Computers (3)Cray Research and Control Data Vector Supercomputers (11)DEC PDP and VAX Systems (1)DOS-Family Systems (18)Early Apple Personal Computers (2)Early Australian Computers (2)Early British Stored-Program Computers (5)Early Commercially Sold Computers (5)Early Japanese Computers (2)Early Massively Parallel Architectures (1)Early Personal and Portable Computers (3)Early Soviet Computers (1)Early Store-and-Forward Dial-Up Networks (1)Embedded and Real-Time Operating Systems (13)Ferranti Computers (2)First-Generation Vacuum-Tube Computers (4)General Electric and Honeywell Mainframe Lineage (1)Graphical and Unix Workstations (1)Harvard Mark Computers (3)Historic Network Operating Systems: NetWare and Banyan VINES (2)Home Computer Operating Systems (13)Home Computers of the Late 1970s and 1980s (4)IAS Machine-Derived Computers (5)IBM Early Business Computers (2)IBM Mainframe and Midrange Systems (3)IBM Supercomputers (5)Japanese Petascale Supercomputers (1)Mainframe and Historical Systems (25)Military and Defense Computers (1)Mobile and Handheld Operating Systems (8)Pre-Internet Packet-Switched Research Networks (4)Punched Card Calculators and Programmable Calculators (1)Research and Academic Operating Systems (25)Sinclair Home Computers (2)TRS-80 Family Computers (2)UNIVAC Line Computers (3)University and Research Laboratory Computers (3)Unix and Unix-Like Systems (32)Xerox PARC Computers (1)Invented ByAllAdam Dunkels (1)Alan Turing (1)Allen Coombs (1)Andrew Booth (1)Andrew S. Tanenbaum (1)Brian Kernighan (1)Christopher Strachey (1)Daniel Slotnick (1)Dave Cutler (1)David Cheriton (1)David Wheeler (1)Dennis Ritchie (1)Don Estridge (1)Edsger W. Dijkstra (1)Feng-hsiung Hsu (1)Fernando J. Corbato (2)Frederic C. Williams (2)Gary Kildall (4)Gene Amdahl (1)Gerard Salton (1)Gordon Bell (1)Harry Huskey (1)Howard Aiken (3)J. Presper Eckert (3)Jerrier A. Haddad (1)Jochen Liedtke (1)John Mauchly (3)John Ousterhout (1)John Pinkerton (1)John Vincent Atanasoff (1)John von Neumann (2)Ken Thompson (1)Konrad Zuse (4)Louis Pouzin (1)Mario Tchou (1)Martin Richards (1)Maston Beard (1)Maurice Wilkes (2)Nathaniel Rochester (1)Richard Altwasser (1)Robert Rex Seeber Jr. (1)Roger Needham (1)Sergei Alekseyevich Lebedev (1)Seymour Cray (5)Steve Scott (computer architect) (1)Steve Vickers (computer scientist) (1)Steve Wozniak (2)Tom Kilburn (2)Tommy Flowers (1)Trevor Pearcey (1)LicenseAllBSD 2-Clause (1)BSD 3-Clause (2)BSD 4-Clause (2)CDDL 1.0 (1)GNU GPL v2.0 (3)MIT (5)Proprietary (Closed Source) (65)Public Domain (1)Sun Public License (1)Show ResultsBrowseCompareSelect all 253386BSDDiscontinued68K/OSDiscontinued86-DOSDiscontinuedA/ROSEDiscontinuedA/UXDiscontinuedAccess Linux PlatformDiscontinuedAcorn MOSDiscontinuedAmiga UnixDiscontinuedAmigaDOSDiscontinuedAmoeba (operating system)DiscontinuedAMSDOSDiscontinuedAmstrad CPCDiscontinuedAndroid ThingsDiscontinuedApple DOSDiscontinuedApple GS/OSDiscontinuedApple IDiscontinuedApple IIDiscontinuedApple PascalDiscontinuedApple ProDOSDiscontinuedApple SOSDiscontinuedArithmometerDiscontinuedARPANETDiscontinuedARX (operating system)DiscontinuedAtanasoff Berry ComputerDiscontinuedAtari 8-bit computersDiscontinuedAtari DOSDiscontinuedAtari STDiscontinuedAtari TOSDiscontinuedAtlas SupervisorDiscontinuedBanyan VINESDiscontinuedBarrelfishDiscontinuedBBC MicroDiscontinuedBBN Time-Sharing SystemDiscontinuedBeIADiscontinuedBendix G-15DiscontinuedBeOSDiscontinuedBeRTOSDiscontinuedBESKDiscontinuedBESYSDiscontinuedBITNETDiscontinuedBlackBerry 10DiscontinuedBlackBerry OSDiscontinuedBlackBerry Tablet OSDiscontinuedBlue GeneDiscontinuedBOS/360DiscontinuedBRLESCDiscontinuedBSD/OSDiscontinuedBull Gamma 3DiscontinuedBurroughs Large SystemsDiscontinuedCairo (operating system)DiscontinuedCambridge CAP computerDiscontinuedCB UNIXDiscontinuedCDC 6600DiscontinuedCDC KronosDiscontinuedCDC SCOPEDiscontinuedChippewa Operating SystemDiscontinuedChorusOSDiscontinuedClassic Mac OSDiscontinuedCoherent (operating system)DiscontinuedColossusDiscontinuedCommodore 64DiscontinuedCommodore AmigaDiscontinuedCommodore PETDiscontinuedCommodore VIC-20DiscontinuedCompatible Time-Sharing SystemDiscontinuedContikiDiscontinuedConvergent Technologies Operating SystemDiscontinuedCP/MDiscontinuedCP/M PlusDiscontinuedCP/M-86DiscontinuedCray C90DiscontinuedCray Operating SystemDiscontinuedCray SV1DiscontinuedCray T90DiscontinuedCray X1DiscontinuedCray X-MPDiscontinuedCray-1DiscontinuedCray-2DiscontinuedCray-3DiscontinuedCSIRACDiscontinuedCSNETDiscontinuedCurtaDiscontinuedCYCLADESDiscontinuedDartmouth Time-Sharing SystemDiscontinuedDASKDiscontinuedData General RDOSDiscontinuedDATAmatic 1000DiscontinuedDeep BlueDiscontinuedDesktopBSDDiscontinuedDG/UXDiscontinuedDigitaOSDiscontinuedDioneOSDiscontinuedDomain/OSDiscontinuedDOS PlusDiscontinuedDOS XLDiscontinuedDOS/360DiscontinuedDYNIXDiscontinuedDYSEACDiscontinuedEdosDiscontinuedEDSACDiscontinuedEDVACDiscontinuedEnglish Electric DEUCEDiscontinuedENIACDiscontinuedETA10DiscontinuedEumelDiscontinuedFerranti Mark 1DiscontinuedFerranti MercuryDiscontinuedFerranti PegasusDiscontinuedFirefox OSDiscontinuedFLEX (operating system)DiscontinuedFlexOSDiscontinuedFreeDOSDiscontinuedFUJICDiscontinuedGeckOSDiscontinuedGEORGE (operating system)DiscontinuedGM-NAA I/ODiscontinuedGNO/MEDiscontinuedGuadalinexDiscontinuedHarvard Mark IDiscontinuedHarvard Mark IIIDiscontinuedHarvard Mark IVDiscontinuedHarwell ComputerDiscontinuedHelios (operating system)DiscontinuedHolborn 9100DiscontinuedHollerith Electronic ComputerDiscontinuedHoneywell 6000 seriesDiscontinuedHP Multi-Programming ExecutiveDiscontinuedHP-UXDiscontinuedIAS MachineDiscontinuedIBM 701DiscontinuedIBM 7090/94 IBSYSDiscontinuedIBM AS/400DiscontinuedIBM PC DOSDiscontinuedIBM Personal ComputerDiscontinuedIBM SSECDiscontinuedIBM System/360DiscontinuedIBM System/390DiscontinuedICL 1900 SeriesDiscontinuedICL 2900 SeriesDiscontinuedIdris (operating system)DiscontinuedILLIAC IVDiscontinuediMAX 432DiscontinuedIRIXDiscontinuedISIS (operating system)DiscontinuedJOHNNIACDiscontinuedJupiter AceDiscontinuedK computerDiscontinuedLEO (computer)DiscontinuedLivermore Time Sharing SystemDiscontinuedMachTenDiscontinuedMADDIDADiscontinuedMagic CapDiscontinuedManchester BabyDiscontinuedManchester Mark 1DiscontinuedMESMDiscontinuedMichigan Terminal SystemDiscontinuedMIPS RISC/osDiscontinuedMNOS (operating system)DiscontinuedMolinuxDiscontinuedMP/MDiscontinuedMS-DOSDiscontinuedMS-DOS 4.0 (multitasking)DiscontinuedMS-DOS 7DiscontinuedMSX-DOSDiscontinuedMulticsDiscontinuedMultiuser DOSDiscontinuedMUSASINO-1DiscontinuedNetWareDiscontinuedNewDos/80DiscontinuedNewton OSDiscontinuedNeXTSTEPDiscontinuedNOS (operating system)DiscontinuedNot Another Completely Heuristic Operating SystemDiscontinuedNSFNETDiscontinuedOdhner ArithmometerDiscontinuedOlivetti EleaDiscontinuedOpenSolarisDiscontinuedORVYL and WYLBURDiscontinuedOS/2DiscontinuedOsborne 1DiscontinuedOSF/1DiscontinuedPalm OSDiscontinuedPanos (operating system)DiscontinuedPC-UXDiscontinuedPDP-11DiscontinuedPilot ACEDiscontinuedPRIMOSDiscontinuedProject MontereyDiscontinuedRAYDACDiscontinuedReeves Electronic Analog ComputerDiscontinuedRemington Rand 409DiscontinuedResearch UnixDiscontinuedRhapsody (operating system)DiscontinuedRISC iXDiscontinuedRoadrunner (supercomputer)DiscontinuedRSTS/EDiscontinuedRSX-11DiscontinuedSequoia (supercomputer)DiscontinuedSHARE Operating SystemDiscontinuedSharpOSDiscontinuedSILLIACDiscontinuedSinclair QDOSDiscontinuedSinclair ZX81DiscontinuedSISNE plusDiscontinuedSMART Information Retrieval SystemDiscontinuedSMSQ/EDiscontinuedSprite (operating system)DiscontinuedStepped ReckonerDiscontinuedSummit (supercomputer)DiscontinuedSun-1DiscontinuedSunOSDiscontinuedSymbianDiscontinuedTENEX (operating system)DiscontinuedTexas Instruments TI-99/4ADiscontinuedTHE multiprogramming systemDiscontinuedTime Sharing Operating SystemDiscontinuedTitan (supercomputer)DiscontinuedTRIPOSDiscontinuedTRS-80DiscontinuedTRS-80 Color ComputerDiscontinuedTRSDOSDiscontinuedTru64 UNIXDiscontinuedTrueOSDiscontinuedTSS (operating system)DiscontinuedTurboDOSDiscontinuedUberStudentDiscontinuedUCSD PascalDiscontinuedUltrixDiscontinuedUniFLEXDiscontinuedUNIVAC 1101DiscontinuedUNIVAC IDiscontinuedUNIVAC IIDiscontinuedUniversal Time-Sharing SystemDiscontinuedUNIX System IIIDiscontinuedUNIX/32VDiscontinuedUNOS (operating system)DiscontinuedUTECDiscontinuedV (operating system)DiscontinuedVAXELNDiscontinuedVersion 6 UnixDiscontinuedVersion 7 UnixDiscontinuedVSTaDiscontinuedWii system softwareDiscontinuedXenixDiscontinuedXerox Operating SystemDiscontinuedXerox StarDiscontinuedZ2 (computer)DiscontinuedZ4 (computer)DiscontinuedZ80-RIODiscontinuedZ-DOSDiscontinuedZuse Z1DiscontinuedZuse Z3DiscontinuedZX SpectrumDiscontinuedConnectionsShowing 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