Duba wurin da ke ƙasa sannan ka amsa tambayar daga baya a cikin harshe ɗaya kamar yadda wurin yake:  Passage: A 1977, Berkeley Software Rarraba (BSD) da aka ci gaba da Computer Systems Research Group (CSRG) daga UC Berkeley, bisa ga 6th edition na Unix daga AT & T. Tun BSD kunshe da Unix code cewa AT & T mallakar, AT & T ya shigar da kara (USL v. BSDi) a farkon 1990s da Jami'ar California. Wannan ya iyakance ci gaba da karɓar BSD.A cikin 1983, Richard Stallman ya fara aikin GNU tare da burin ƙirƙirar tsarin aiki na kyauta na UNIX. A matsayin wani ɓangare na wannan aikin, ya rubuta GNU General Public License (GPL). A farkon shekarun 1990, akwai kusan isasshen software don ƙirƙirar cikakken tsarin aiki. Koyaya, kernel na GNU, wanda ake kira Hurd, ya kasa jan hankalin isasshen ƙoƙarin ci gaba, yana barin GNU bai cika ba.A cikin 1985, Intel ta saki 80386, farkon mai sarrafawa na x86 tare da saitin umarni na 32-bit da naúrar sarrafa ƙwaƙwalwar ajiya tare da paging.A cikin 1986, Maurice J. Bach, na AT&T Bell Labs, ya buga Tsarin Tsarin UNIX. Wannan tabbataccen bayanin ya shafi tsarin V Release 2 kernel, tare da wasu sabbin abubuwa daga Release 3 da BSD.  Tambaya: Menene burin Stallman?
ƙirƙirar tsarin aiki na UNIX-kamar kyauta