BSD ǟ ͟Ǯ ˨ Ͳ˨ d ͭ¤ Ǜ AT&T' Ƿͧ ǟ ͟Ǯ ǰ ǰ UNIX System V' °ͬ°d ͚ͯ, Ƿ AT&T ǰ ˰ˡ Ǩ˰ Ǭ ͮͤ ߨd
ͯ AT&T ˨ Ǩ˰ ߾ d ǰ ͤ BSD'Ǔ d ͤ Ͱäͷ AT&T ǰ ͯ˰ͨ߾ ͬͯ, ͕ͥ ͪ Ǩ ͚ Ͱǰ ˰ˡ ͯ Ǜd Ǖ CSRG ǰ ߾ǰ Ǫ ܤ ߾˰ ߾ Berkley Software Distribution BSDd
Ͱ BSD' ߾ d ͤ LJ ͥ ͤ Defence Advanced Research Agency (DARPA) CSRG' ͤ ͪ d ͤ CSRG' DARPA' ǟ߾͕ Ͱ˕ ARPANET Ͱǡ ߿ͬ ͤd Ͱ˕ ͟ǟ Ͱ˕d ͤ Ͱ˕ǰ TCP/IPd TCP/IP ͟ǟ Ͱ˕ǰ ͬ°ͣ d ͬ߂ͪ°ͣ ǟ ͟Ǯ Ǭ BSD' ͯ ͯä Ǜ, 4.2 BSD' ; ǰ d
Ƕ ߾͕͟Ƕ ˮͪ d ǰ ǕLJ ͬ ǟ ͟Ǯ Ȱ LJ ǰ ͪǰ ͯ Ǩ d Ƿ Ͱ˸͟Ǯ Ǩ 4.2 BSD' ͤ SunOS Ȱ d AT&T LJ ͯ Ͱ , Ͱ System III LJ System V d System V' ˨ ǟ߾͕ ˡ , Ͱ ͕LJ BSD' ߾ ͤͭͤ d ͯ Ͳǖ˗ͯ TCP/IP ߾, csh Dz VI d BSD Ǖ ߾ ߾˕ Ͱ Berkeley Extensionsd
BSD' ߾ Ǫ AT&T' ˰ˡ ˰ Ǩǰ Ͱ˜ d ǰ ǖ Dz CSRG' ͥͥ Ͱ Ƿ ͪ°ͣ BSD ͰǕ͟ ͧ ߾ Ͱd ͥ Ͱǰ ͯ AT&T' ˰ˡǰ ͟ Ͱǰ ͯ˗ d Ͳǖͯ , BSD' ˡǰ ͬ Ǩ˰d Ƿ ǟ߾͕ Ǫ , NET/2 , Ͱǰ ͯ ˰ˡ Ͱǰ ͯ˗ ͤ߿ d Net/2 ˨ ͬ߂ͪ°ͣ ǟ ͟Ǯ , Net/2' ͨDz Ǖ Ͱ % ˡ ߾ Ǜd CSRG' ͯ ߾ ˲ ͟ ˡ ǖǨ Ͱ 386BSD Ͱ Ǩd CSRG' Ͱͤ ͯͯǰ Ͱ Berkley Software Design Inc ˮͪ Ǩ Net/2' ˰ˡǰ ͤ BSD/386 ǰ ǟ ͟Ǯǰ ǟ ͕ Ͱ Ǩd ǟ ͟Ǯ ͬ BSD/OS d
ǟ ͟Ǯ ͰǕ͟ Ǭ 386BSD ܾ Ǩd ͰǕ͟ Ǖ ǰ NetBSD FreeBSD ǟ ͟Ǯ ͰǕ͟ǰ d ² 386BSD' ͨ ͯ Ǖ Ǖͷ ߾LJ ͰǕ͟ǰ ͭ d NetBSD ͰǕ͟ǰ Ͱ ǰ Ͱ ǰ Ƿ Ͱ FreeBSD' Ͱ ͕d ǰ ͰǕ͟ ˰ˡ Ƕ ͥͯ ǖ ǰ ¤ ߨd ܾ ͰǕ͟ ˰ ͷͯ ͨ, ˚ Ǜd NetBSD ͰǕ͟ Ǖ Ǖ ǰ LJ OpenBSD ͰǕ͟d