CPU Stands for: Central Processing Unit. A CPU Is responsible to carrie out most of the commands/instructions of a computer hardware and software.
RAM (Random Access Memory)
RAM stands for Random Access Memory. RAM is a form of computer data storage. A Random Access Device that allows stored data to be accessed directly in random order. Also all data stored in the RAM is lost when the computer is turned off.
Motherboards (System Board/Mainboard)
The Motherboard serves to connect all of the components/parts of a computer together (like The CPU, memory, hard drives, optical drives, video card, sound card) or other device with connectors for other crcuit boards to be slotted into it .