The operating system (OS) is the most important amongst all the programs that run on the computer. An Operating System is a must for a general purpose computer to run other programs and applications. The operating system is a medium through which all the basic tasks of the computer such as taking an input from the keyboard, sending an output to display screen, keeping track of files and directories on the disk, and controlling peripheral devices such as printers are carried out.
For large system, the responsibilities and the power consumed by the operating system gets increased. The operating System behaves like the traffic cop of computer, which makes sure that all the programs and users running at the same time works effectively without hampering or interfering in other’s work. Operating system is also responsible for security, assuring that no unauthorized user gets access to the system.
Following are some of the important functions of an Operating System.
• Memory Management
• Processor Management
• Device Management
• File Management
• Control over system performance
• Job accounting
• Error detecting aids
• Coordination between other software and users
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