UNIX is an operating system developed in 1969 by AT&T employees which includes Denis Ritchie, Ken Thompson and Brian Kernighan at Bell Laboratories. The UNIX which we use today has evolved from UNICS(UNIplexed Operating & Computing System) which is considered to be the very first version of UNIX.
UNIX was ported to different architectures, which then was distributed among different colleges and universities for a very small amount of fees, so that it gets encouraged. Slowly it started gaining popularity by a large number of students who later joined companies where they influenced the choice of operating system fo the usage in their respective companies ant thus helped UNIX to gain wide acceptance among both students and professionals.
As UNIX was distributed in the form of source code, it has resulted in many offshoots, but there are mainly two base version available.
- AT&T System V
- Berkley Software Distribution (BSD)
- number of utilities available
- their switches
- implementation of file structure