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Timeline
Input devices are used to instruct the computer what to do.
Keyboard, mouse, microphone and scanner are some of the input devices.
The device that works on the input is called a processing device. CPU is the processing
device.
Output devices are used to give the results.
Monitor, printer, speakers and headphones are some of the output devices.
Storage devices are used to store our work.
Hard disk, CD, DVD and pen drive are some of the storage devices.
A computer works in three steps: Input Process Output. This is also called IPO
cycle.
A computer uses its input devices, processing device and output devices to follow
each stage of the IPO cycle.
Chapter 1: More About a Computer
Choose the correct option.
Which of the following can take decisions on its own?
a. b.
c. d.
Fill in the blanks with the correct words.
Hints Hospital, Mistake, Desktop
1. A computer that is kept on the table is called a .
2. In a , computers are used to prepare medical reports.
3. A computer can never make , while a human can.
Computer Devices 27

