The part of the computer that follows instructions is called the central processing unit (CPU). The CPU usually has two components. The arithmetic/logic unit (ALU) performs arithmetic operations (addition, subtraction, multiplication, and division) and logical operations (comparing two values). The control unit controls the actions of the other components so that program instructions are executed in the correct order.
Central Processing Unit (CPU) The part of the computer that executes the instructions (program) stored in memory; made up of the arithmetic/logic unit and the control unit.
Arithmetic/Logic Unit (ALU) The component of the central processing unit that performs arithmetic and logical operations.
Control Unit The component of the central processing unit that controls the actions of the other components so that instructions (the program) are executed in the correct sequence.
For us to use computers, we must have some way of getting data into and out of them. Input/Output (I/O) devices accept data to be processed (input)
