Motherboards
The motherboard serves as the computer's backbone. All devices in a computer are connected to it in some way; it hosts the largest single collection of chips of any computer component and links all the components, making it possible for them to communicate. The motherboard also defines the computer's limits of speed, memory, and expandability. The motherboard is usually the largest circuit board found inside the computer case. Motherboards come in a number of sizes or form factors of which the AT and ATX form factors are the two main varieties.