1969:
Developed at AT&T
00:00:00 Jan 1, 1970 is "time zero" in Unix
An experiment on an old, unused computer (a DEC PDP-7)
“Unix” is a pun on “Multics”
1970:
Ported to a PDP-11/20
C programming language invented by Dennis Ritchie to make it easier
1973:
Ken Thompson and Dennis Ritchie re-wrote kernel in C
1974:
Source is being distributed to Universities
Since AT&T had trade restrictions due to their telephone monopoly, they
couldn't really make money off of Unix
Unix begins gaining a stronghold in Universities (which would eventually lead
to Unix's commercial success)
1976:
Version 6
1977:
First version of BSD Unix
Based on AT&T Version 6
Developed by the Computer Systems Research Group at UC Berkeley
1979:
Version 7
Focused on being portable to various architectures
AT&T begins charging for Unix source license
$100 for universities, $21,000 for everyone else
3BSD adds virtual memory
1983:
System V
1984:
BSD 4.2
Added TCP/IP networking
1985:
BSD 4.3
1987:
System V, Release 3 (Usually written Vr3 or V.3)
1990:
System V, Release 4
Sun and AT&T. Attempted to combine the best of
System V and BSD
Open Software Foundation (OSF) formed
DEC, HP, IBM, and some others
1991:
OSF/1
The OSF's attempt to combine the best of System V and
BSD
DEC (now Compaq) is the only vendor who has actually used the OSF/1 system,
though HP and IBM both use elements from OSF/1.
First Linux kernel
1992:
Unix sold to
Novell
1993:
BSD 4.4
????:
Unix sold to
X/Open Consortium
1994:
Linux kernel 1.0
1994:
The web takes off, Unix is the primary server
platform, demand soars
There's a good article on Unix history at http://www.byte.com/art/9410/sec8/art3.htm
and a totally cool Unix history chart at http://perso.wanadoo.fr/levenez/unix/