CPU

Abbreviation for central processing unit . 1. The portion of a computer that includes circuits controlling the interpretation and execution of instructions. ( 188 ) 2. The portion of a computer that executes programmed instructions, performs arithmetic and logical operations on data , and controls input / output functions. Synonym central processor . 3. Abbreviation for communications processor unit . The portion of a digital communications switch that executes programmed instructions, performs arithmetic and logical operations on signals, and controls input/output functions.