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Processing Device REFRESH
The device that works on the input is called processing
A computer works in three steps: Input → Process → Output. This is also called
device. CPU is the main processing device. IPO cycle.
CPU stands for Central Processing Unit. It works The devices that are used to enter data into the computer and give orders are called
like the brain of a computer. CPU is fixed inside the input devices. Some input devices are keyboard and mouse.
CPU box.
CPU CPU Box The device that works on the input is called processing device. CPU is the main
Output Devices processing device.
The devices that are used to get the results are called output devices. Some of the
The devices which help us to get the results are called output devices. Some of the
commonly used output devices are monitor, printer, headphones and speakers.
commonly used output devices are monitor, printer, headphones and speakers.
TeCh Ready
A. Tick ( ) the correct option.
Monitor Printer Headphones Speakers
1. Which of the following works like the brain of the computer?
Imagine, you have a magical input device that can take any object from the (i) (ii)
real world and put it into your computer. What would you put in, and what
would you want the computer to do with it?
(iii) (iv)
2. Which of the following is not an output device?
(i) (ii)
(iii) (iv)
3. Which of the following is an input device?
(i) (ii)
(iii) (iv)
Working of a Computer 11

