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BIOS - Wikipedia

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A computer's basic input/output system (BIOS) is a program that's stored in nonvolatile memory such as read-only memory (ROM) or flash memory, making it firmware. The BIOS (sometimes called ROM BIOS) is always the first program that executes when a computer is powered up.
This rewriting of the contents is sometimes termed flashing. It can be done by a special program, usually provided by the system's manufacturer, or at POST, with a BIOS image in a hard drive or USB flash drive. A file containing such contents is sometimes termed a BIOS image.
Traditionally, the BIOS (the computer boot up instruction set) was always stored in ROM because it is non-volatile. However, flash memory (which is also non-volatile, but not read-only) is now often used for the BIOS so that changes to the instructions can be made.
read only memory. abbreviation for read only memory: a type of computer memory that holds information that can be used but not changed or added to. Compare.
The BIOS (Basic Input Output System) is a type of system software, which is stored in ROM located on the motherboard.

What is BIOS ? | Explained

In this video I explain what is BIOS, what role it play in the computer, where bios stored, and how to access BIOS. PERSONAL...

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Memory usage:0.44851684570312Mb; real memory usage: 2Mb