Microprocessor – The microprocessor is the “brains” of the computer.  It’s a computer processor on a microchip.  Often when a computer is turned on, the microprocessor first gets its instructions from the Basic Input/Output System (BIOS.)  After that, either the BIOS, or the operating system that the BIOS loaded into computer memory, and/or a computer application, gives the microprocessor instructions on how to perform.