Operating System


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Operating System
	An operating system is software which controls the general operation of a computer. An operating system controls the loading ...and running of programs (interpreting and executing each command) controls the use of peripherals such as disc drives and printers organises the use of the computer’s memory. handles interrupts (signals from devices) maintains security (passwords etc) Part of the operating system is stored on a ROM chip. When the computer is switched on, the first thing that happens is that part of the operating system is loaded into memory. This process is called booting up.	A computer cannot work without an operating system.
	Examples of Operating Systems : UNIX Linux Windows MS-DOS
	Software may be specific to a particular operating system and would therefore not work under a different operating system.

Exercise : Operating Systems
An operating system is a without which a computer cannot work. The operating system... maximises the use of the computer's loads and runs other handles inputs and outputs from handles - signals from devices in need of attention maintains - passwords etc Booting up is the process of loading the operating system into memory.
(Green indicates success)