The main circuit board inside personal computers which holds the majority of computer components and provides connectors for peripherals is motherboard.
A computer's main board is referred to as the "system board" or "motherboard," while smaller ones that plug into slots on the main board are referred to as "boards" or "cards." See also the terms motherboard, expansion card, and flexible circuit.
The motherboard is the primary wire harness of a computer. It's a thin plate that houses the CPU, memory, hard drive and optical drive connectors, expansion cards to control video and audio, and connections to your computer's ports (such as USB ports).
Thus, the answer is motherboard.
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