Context: A general purpose computer has four main components: the arithmetic logic unit (ALU), the control unit, the memory, and the input and output devices (collectively termed I/O). These parts are interconnected by buses, often made of groups of wires.

Question: The ALU of a computer stands for what?
Answer: arithmetic logic

Question: Input and output devices are known as what term?
Answer: I/O

Question: Besides the ALU, input and output devices, what are the other two main components of a computer?
Answer: the control unit, the memory