In computer: Central processing unit. It is composed of an arithmetic-logic unit (ALU) and control circuits. The ALU carries out basic arithmetic and logic operations, and the control section determines the sequence of operations, including branch instructions that transfer control from one part of a program to another …

ALU and CU both are the two basic components of a CPU (Central Processing Unit) in a computer system. ALU stands for the Arithmetic Logical Unit whereas CU stands for the Control Unit. Control Unit (CU) is the part of the CPU that is dedicated to deal with the controlling purpose.

A control unit or CU is circuitry that directs operations within a computer’s processor. Examples of devices that utilize control units include CPUs and GPUs. A control unit works by receiving input information that it converts into control signals, which are then sent to the central processor.

The control unit of the central processing unit regulates and integrates the operations of the computer. It selects and retrieves instructions from the main memory in proper sequence and interprets them so as to activate the other functional elements of the system at the appropriate moment…

Control Unit is the part of the computer’s central processing unit (CPU), which directs the operation of the processor. It is the responsibility of the Control Unit to tell the computer’s memory, arithmetic/logic unit and input and output devices how to respond to the instructions that have been sent to the processor.

The control unit controls and monitors communications between the hardware attached to the computer. It controls the input and output of data, checks that signals have been delivered successfully, and makes sure that data goes to the correct place at the correct time.

For instance, a keyboard or computer mouse is an input device for a computer, while monitors and printers are output devices. Devices for communication between computers, such as modems and network cards, typically perform both input and output operations.

An input device is something you connect to a computer that sends information into the computer. An output device is something you connect to a computer that has information sent to it.

The most common output device is the monitor or VDU. Modern monitors, where the case isn’t more than a few centimetres deep, are usually Liquid Crystal Displays (LCD) or Thin Film Transistors (TFT) monitors.

Monitors and printers are two of the most commonly used output devices used with a computer.