Control Unit – controls all parts of the computer system. It manages the four basic operations of the Fetch Execute Cycle as follows:
Fetch – gets the next program command from the computer’s memory
Decode – deciphers what the program is telling the computer to do
Execute – carries out the requested action
Store – saves the results to a Register or Memory
Arithmetic Logic Unit (ALU) – performs arithmetic and logical operations
Register – saves the most frequently used instructions and data