BIOS

BIOS, computing, stands for Basic Input/Output System. The BIOS is a computer program embedded on a chip on a computer's motherboard that recognizes and controls various devices that make up the computer. The purpose of the BIOS is to make sure all the things plugged into the computer can work properly. It brings life to the computer, and the term is a pun^[source?] on the Greek word βίος, bios meaning "life".^[1]

"Booting", sometimes called "Booting up" is the process that the computer completes to get it ready to use when it is first turned on. When the computer turns on, the BIOS starts up and performs a Power-On Self Test (POST). During the POST, the BIOS will check various devices in the computer like the computer processor, memory, the video card and others to make sure they are present and functioning. Once the POST has completed successfully, the BIOS looks for an operating system to load, which is usually located on the computer's hard drive. When it finds one, it starts to load it. At this point, the operating system takes over control of the system.

1. ↑ "Henry George Liddell, Robert Scott, A Greek-English Lexicon, βίος". www.perseus.tufts.edu. Retrieved 2017-03-10.