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Processing Device
The CPU (Central Processing Unit) is a processing device
that works on input and sends the result to the output
devices. The CPU is a chip which is placed inside the CPU
box.
The CPU is also called the “brain” of a computer as it
is responsible for all the work done. It is further divided CPU CPU Box
into three parts: ALU, CU and MU.
CPU
Arithmetic Logic Unit (ALU) Memory Unit
The Arithmetic Logic Unit (ALU) does all the arithmetic
calculations like addition, subtraction, multiplication, division, etc.
Control Unit
It also does comparisons like greater than, less than, equal to, etc.
Control Unit (CU) Arithmetic Logic Unit
The Control Unit (CU) coordinates and controls all the parts of the CPU. The CU gets
the data and instructions from the memory unit and it passes them to the ALU in a
step-by-step manner.
Memory Unit (MU)
The CPU also has a memory like human beings. The Memory Unit (MU) stores the data
and instructions that you give to the computer along with the results of the processing.
Output Devices
The result we get after processing is called Output. The devices which help us to get
these results or outputs are called output devices. Let us study about some of the
commonly used output devices.
Monitor
A monitor looks like a television. It is also known as a Visual
Display Unit or VDU. The monitor shows the data that you input
and its result (output) after the computer processes it.
Monitor
Speakers
Speakers are used to hear music, voice and sound on a computer.
Speakers
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A Computer System

