What does CPU stand for?

What does CPU stand for?

• Core Processing Unit
• Custom Processing Unit
• Central Processing Unit
• Computer Processing Unit 

EXPLANATION

A central processing unit is the electronic circuitry within a computer that carries out the instructions of a computer program by performing the basic arithmetic, logical, control and input/output operations specified by the instructions. The computer industry has used the term "central processing unit" at least since the early 1960s.Wikipedia