Basic Unix History

Unix History Timeline

Some key dates in the development of different Unix versions:
1970 Ken Thompson suggests the name "Unix" for the fledging operating system born in 1969 at AT&T Bell Labs.
1973 The kernel (core) of Unix is re-written in the C language, making it the world’s first operating system that’s "portable"—that is, able to run on multiple kinds of hardware.
1977 First BSD (Berkeley Software Distribution) version released. Licensees must also get a license from AT&T.
1983 Version 4.2 BSD is released. By the end of 1994, more than 1,000 licenses are issued. AT&T release its commercial version "System V"
1983 AT&T releases "System V release 3." IBM, Hewlett-Packard and others base their own Unix-like systems on this version.
1991 Linus Torvalds releases version 0.02 of Linux. An open source Unix-like operating system.
1992 Bill Jolitz releases 386/BSD, a full version of Unix with no AT&T code.
1992 Sun Microsystems release Solaris, a version of Unix based on System V release 4, incorporating many BSD features.
1994 BSD4.4-Lite is released by Berkeley. It is entirely free of legal encumbrances from the old AT&T code. Version 1.0 of Linux is also released this year; Linux incorporates features from both AT&T’s System V and BSD versions of Unix.
1999 Apple releases Darwin, a version of BSD Unix, and the core of the Mac OS X.

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