The purpose of.....

Input devices:

• to make selections from the menus or to choose icons
• to the cursor on the screen
• to produce graphics
• to move images and create windows on the screen

Storage devices:

A computer usually contain several kind of storage, each with and individual purposes. Adigital computer represents data using the binary numeral system. A piece of information can be handled by any computer whose storage space is large enough to accommodate the binary representation of the piece of information, or simply data. For example, using eight million bits, or about one megabyte, a typical computer could store a small novel.

Output devices:

An output device is used to communicate the results of data processing carried out by an informtion processing system (such as a computer) to the outside world.