Computer Hardware

Computers typically have central processing units, memories and input / output devices:

Central processing units are composed of control units and processors. Processors are composed of arithmetic logic units and registers. Control units direct the executions of programs. Compilers convert programs written in human friendly languages to instructions understandable by control units. Arithmetic logic units perform arithmetic and logic operations on values stored in registers.

Input / output devices include keyboards, mice, monitors, printers and networking equipment. Central processing units read and write values with respect to input / output devices via memory.