Components of Computer What are the components of a computer? Let’s understand each component in details. Input Unit Computers have input unit which is used to take inputs from user.These are the devices which are used for entering the data into computer system. Output Unit Computers have output unit which is used to show output to the user.These are the devices which are used to show the output or result from computer system. Memory Unit Memory is the storage of computer.Each component of computer store the data as well as instructions in Memory Unit. CPU A CPU is central processing unit which is also known as processor.Consider CPU as the brain of computer.It is responsible to process data and instructions in computer.