UNIX History First developed in 1969 by Ken Thompson and Dennis Ritchie of the Research Group at Bell Laboratories; incorporated features of other operating systems, especially MULTICS The third version was written in C, which was developed at Bell Labs specifically to support UNIX The most influential of the non-Bell Labs and non-AT&T UNIX development groups — University of California at Berkeley (Berkeley Software Distributions - BSD) 4BSD UNIX resulted from DARPA funding to develop a standard UNIX system for government use Developed for the VAX, is one of the most influential versions, and has been ported to many other.
