System III & V familyBSD (Berkeley Software Distribution)FreeBSDNetBSDOpenBSDSunOSSolarisNextStepXenix OSGNULinuxCommercialUNIXHP-UXAIXUnixWareIRIXBSD family1970198019902000TimeMicrosoft/SCORichard StallmanDarwinGNU/HurdLinus TorvaldsAndrew S. TanenbaumMinix3.36.5.304.1.4Research UNIX10.5Bell Labs: Ken Thompson,Dennis Ritchie, et al.Bill JoyAT&TIBMSGIUnivel/SCO20104.46.111.0macOS10.127.111.37.211i v 34.113.416.4Sun/OracleAppleTheo de Raadt0.9Matthew DillonDragonFly BSD4.8