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BSD (Berkeley Software Distribution)
FreeBSD
NetBSD
OpenBSD
Solaris (SUN)
NextStep
Xenix OS
GNU Project
BSD family
1970
1980
1990
2000
Time
Bill Joy
Microsoft/SCO
Richard Stallman
Darwin
6.2
3.1
4.1
10
3.3
System III & V family
Unix Time-Sharing System (Bell Labs)
HP-UX
AIX (IBM)
UnixWare (Univel/SCO)
IRIX (SGI)
Linus Torvalds
Andrew S. Tanenbaum
Minix
Ken ThompsonDennis Ritchie (C language)
3.1.2a
10
11i v2
5 L 5.3
7.1.4 MP2
6.5.30