WHAT IS COMPUTER?

An electronic device (machine) that performs four basic operations: input, processing, output and storage.


CATEGORIES OF COMPUTER:
1.Supercomputers
2.Mainframes
3.Personal Computers
4.Mobile Computers and Devices
5. Embedded Computers


SUPERCOMPUTER

 •A supercomputer is the fastest, most powerful,  most expensive computer and used for very complex, sophisticated job such as nuclear research, calculating weather patterns, petroleum exploration, online banking, automotive design.



MAINFRAMES

•A mainframe is a large, expensive, powerful computer that can handle hundreds or thousands of connected users simultaneously (multi-user) and storing tremendous amounts of data, instructions and information.
•Mainframes are often used in businesses that manage large amounts of data, for example, insurance companies use mainframes to process information about millions of policyholders.



PERSONAL COMPUTERS

•Personal computer is a computer that can perform all its input, processing, output and storage activities by itself.
•Two types of personal computers are desktop computers, and notebook computers



MOBILE COMPUTERS AND MOBILE DEVICES 

 •Mobile computer is a personal computer (that can perform all of its input, processing, output, and storage activities by itself) that you can carry from place to place



EMBEDDED COMPUTERS

•Special-purpose computer that functions as a component in a larger product and perform various functions depending on the product.


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