Sunday, July 31, 2011

What is Booting

In computing, booting (also known as booting up) is a bootstrapping process that starts operating systems when the user turns on a computer system. A boot sequence is the initial set of operations that the computer performs when power is switched on. The boot loader typically loads the main operating system for the computer.
Beginning with the IBM 701 in the 1950s to the present, booting has been used to load operating systems into
main memory of mainframe computers, mini computers, and personal computers. An exception is plug and play systems that execute directly from ROM, such as video game systems and computer printers. Numerous examples exist of single-stage booting and multi-stage booting that begin by execution of boot program(s) stored in BIOS or boot ROMs during which binary code of the operating system is loaded (copied) from non-volatile secondary storage (such as a hard disk drive) into volatile memory (RAM) during the booting process and then executed. The booting concept is also known as "Initial Program Load" for IBM mainframe computers.
The computer word "boot" is short for "bootstrap" (itself short for "bootstrap load"). The term bootstrap derives from the idiom to pull oneself up by one's bootstraps. The term refers to the problem whereby a computer cannot run without first loading software but must be running before any software can be loaded

From Wikipedia, the free encyclopedia

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