History of UNIX

§  First Version was created in Bell Labs in 1969.

§  Some of the Bell Labs programmers who had worked on this project, Ken Thompson, Dennis Ritchie, Rudd Canaday, and Doug McIlroy designed and implemented the first version of the Unix File System on a PDP-7 along with a few utilities. It was given the name UNIX by Brian Kernighan.

§  00:00:00 Hours, Jan 1, 1970 is time zero for UNIX. It is also called as epoch.

§  1973 Unix is re-written mostly in C, a new language developed by Dennis Ritchie.

§  Being written in this high-level language greatly decreased the effort needed to port it to new machines.

§  1977 There were about 500 Unix sites world-wide.

§  1980 BSD 4.1 (Berkeley Software Development)

§  1983 SunOS, BSD 4.2, System V

§  1988 AT&T and Sun Microsystems jointly develop System V Release 4 (SVR4). This later developed into UnixWare and Solaris 2.

§  1991 Linux was originated.

History of UNIX