ABSTRACT
UNIX is an extremely popular operating system and dominates in the highpowerd, multitasking workstation market. It is relatively simple to use and to administer, and also has a high degree of security. UNIX computers use TCP/IP communications which they uses to mount disk resources from one machine onto another. Its main characteristics are:
Multiuser.
Preemptive multitasking.
Multiprocessing.
Multithreaded applications.
Memory management with paging (organizing programs so that the program is loading into pages of memory) and swapping (which involves swapping the contents of memory to disk storage).
