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STORAGE DEVICES
Other than input devices, processing device and output devices, a computer also uses
storage devices. The storage devices are used to store our work. Some of the storage
devices are:
Hard Disk
It is fixed inside the CPU box. It can store the files that we create on
computer and can be used later.
CD and DVD
These are small storage devices. The storage capacity of a
DVD is more than a CD.
Pen Drive or USB Flash Drive
It is a very small storage device. The storage capacity of a pen drive is
more than a DVD but less than a hard disk.
WORKING OF MACHINES
Have you seen your mother making mango shake for you? This is what she does to
make the mango shake.
1. She puts the mango pieces, sugar and milk in the blender.
This is the input.
2. The blender mixes all the things. This is the process.
3. She pours the mango shake in the glass. You can drink it
now. This is the output.
INPUT PROCESS OUTPUT
This is also called IPO cycle. Let us look at some more examples of IPO cycle.
Computer Devices 23

