History of Unix operating system

1.1965,Bell Telehpone Laboratories develop a new operating system called Multics.

2.1973,the Unix OS was rewritten in C.

3.1977,Unix were first ported to a non-PDP machine.

4.1983,Bell Laboratories,Unix System V.

5.1977-1982, a variant of Unix system called BSD,develop by University of California at Berkerley.

5.1984,100000 Unix System installations in the world.