A computer system is a collection of hardware and software components designed to provide an effective tool for computation. Computer system are used in every walk of life to assist us in the various tasks we perform. The wide availability of the internet has enhance the use of computer for information sharing and communication. Computer system allows us to store, process, display and communicate information. In any modern computer system even a simple one, in general needs several different programs in order to accomplish its various functions.

Wednesday, April 12, 2023

UNIX operating system

The UNIX operating system is a set of programs that act as a link between the computer and the user. The origin of UNIX can be traced back to 1965, when a joint venture was under-taken by Bell Telephone Laboratories, the General Electric Company and Massachusetts Institute of Technology. The first Unix OS was developed by Ken Thompson and Dennis Ritchie at Bell Laboratories in 1969.

UNIX is written in high-level language. About 95% of the OS is written in C programming language. 'C' making it easy to port to different configurations. The ability to transport the UNIX system from one brand of computer to another has been the major reason for the acceptance of this system.

It uses a hierarchical file system that allows easy maintenance and efficient implementation. UNIX uses a consistent format for files, the byte stream, making application programs easier to write.

The main features of UNIX include multiuser, multitasking and portability capabilities. Multiple users access the system byconnecting to points known as terminals. Several users can run multiple programs or processes simultaneously on one system.

UNIX is now a family of operating systems:
– AIXfrom IBM
– HP-UXfrom Hewlett-Packard
– GNULinux from Free Software Foundation
– Solaris, SunOSfrom Sun Microsystems
UNIX operating system

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