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also known as mainboard (which also has a tag and should be a synonym)
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The motherboard or mainboard is the central printed circuit board (PCB) in many modern computers and holds many of the crucial components of the system.

The motherboard is the central printed circuit board (PCB) in many modern computers and holds many of the crucial components of the system.

The motherboard or mainboard is the central printed circuit board (PCB) in many modern computers and holds many of the crucial components of the system.

The motherboard is the central printed circuit board (PCB) in many modern computers and holds many of the crucial components of the system.

The motherboard is the central printed circuit board (PCB) in many modern computers and holds many of the crucial components of the system.

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