The motherboard (or mainboard) is the primary circuit board for a personal microcomputer.
Many other components connect directly or indirectly to the motherboard. Motherboards usually
contain one or more CPUs, supporting circuitry and ICs for CPU operation, main memory, and
facilities for initial setup of the computer immediately after being powered on (often called boot
firmware or a BIOS). In many portable and embedded personal computers, the motherboard houses
nearly all of the PC's core components. Often a motherboard will also contain one or more
peripheral buses and physical connectors for expansion purposes. Sometimes a secondary daughter
board is connected with the motherboard to provide further expandability or to satisfy space
constraints.
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