Home›Operating System›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ByDiscontinuedThis dimension marks whether a computing system is still actively developed, discontinued or superseded.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 Browsing by status separates systems still current from those no longer maintained.FactsDiscontinuedSourcesComments (0)Reader Challenges (0)FactsComparisonEra of EmergenceWell-attested1956 CE 1DiscontinuedFilter Results48 entriesSystem ClassAllClassic Mac OS and Apple Systems (3)DOS-Family Systems (2)Embedded and Real-Time Operating Systems (5)Home Computer Operating Systems (5)Mainframe and Historical Systems (9)Mobile and Handheld Operating Systems (6)Research and Academic Operating Systems (4)Unix and Unix-Like Systems (14)YearAll1988 (1)1995 (1)1996 (1)1997 (1)1999 (1)ACM AreaAllOperating Systems (1)GroupAllClassic Mac OS and Apple Systems (3)DOS-Family Systems (2)Embedded and Real-Time Operating Systems (5)Home Computer Operating Systems (5)Mainframe and Historical Systems (9)Mobile and Handheld Operating Systems (6)Research and Academic Operating Systems (4)Unix and Unix-Like Systems (14)LicenseAllProprietary (Closed Source) (3)BrowseCompareSelect all 4886-DOSDiscontinuedA/UXDiscontinuedAccess Linux PlatformDiscontinuedAcorn MOSDiscontinuedAmiga UnixDiscontinuedApple SOSDiscontinuedBarrelfishDiscontinuedBeIADiscontinuedBeOSDiscontinuedBlackBerry OSDiscontinuedCB UNIXDiscontinuedChorusOSDiscontinuedConvergent Technologies Operating SystemDiscontinuedCray Operating SystemDiscontinuedDartmouth Time-Sharing SystemDiscontinuedDesktopBSDDiscontinuedDomain/OSDiscontinuedFirefox OSDiscontinuedFLEX (operating system)DiscontinuedHelios (operating system)DiscontinuedHP Multi-Programming ExecutiveDiscontinuedHP-UXDiscontinuedIBM 7090/94 IBSYSDiscontinuedIdris (operating system)DiscontinuedIRIXDiscontinuedMachTenDiscontinuedMagic CapDiscontinuedMIPS RISC/osDiscontinuedMSX-DOSDiscontinuedNeXTSTEPDiscontinuedNOS (operating system)DiscontinuedOpenSolarisDiscontinuedPalm OSDiscontinuedPanos (operating system)DiscontinuedPC-UXDiscontinuedPRIMOSDiscontinuedRISC iXDiscontinuedRSX-11DiscontinuedSharpOSDiscontinuedSymbianDiscontinuedTru64 UNIXDiscontinuedTSS (operating system)DiscontinuedUltrixDiscontinuedUNIX System IIIDiscontinuedUNOS (operating system)DiscontinuedV (operating system)DiscontinuedVAXELNDiscontinuedZ-DOSDiscontinuedSources1. Wikipedia: GM-NAA I/Otier 2WikipediaGM-NAA I/O, lead sectionQuote, GM-NAA I/O, lead sectionIt was created in 1956 by Robert L. Patrick of General Motors Research and Owen Mock of North American Aviation.View the SourceComments (0)No comments yet. Be the first to share a thought.Sign in to join the discussion.Reader Challenges (0)No disputes yet. Spotted an error or a better source? Open the first one.Sign in to dispute this or suggest a correction.