Unix.

UNIX This is a review of Unix that was obtained from www.ugu.com. Unix is a multi-user and multitasking operating system that was developed in the early 1970's by scientists from Bell Laboratories. Because of federal regulations Bell Laboratories was prohibited from promoting UNIX in the commercial marketplace but instead licensed it to colleges and universities for a low fee. At the schools it was implemented on many different types of computers. After the …

…to work with multiple CPUs using multiprocessing. It is also most often used on workstations and servers. Unix does have some weaknesses, one of which is that it has a command line interference, and many of its commands are hard to remember and use. Some versions of UNIX offer graphical user interface to reduce this problem. Also if you want to move an application from one UNIX version to another you must rewrite some programs.