What is a full form of CPU?

A central processing unit, also called a central processor, main processor or just processor, is the electronic circuitry that executes instructions comprising a computer program. The CPU performs basic arithmetic, logic, controlling, and input/output operations specified by the instructions in the program.

CPU stands for Central Processing Unit. It is also known as a brain of the computer. It carries out instructions and computer programs and performs all the basic arithmetical and logical operations. CPU is installed in the motherboard on a specific area known as CPU socket.

Traditionally the term CPU refers to a processor which includes control unit and arithmetical logical unit.