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How Many Types of Computers

TYPES OF COMPUTERS:
There are different types of computers with respect to size, speed, storage capacity and cost, computers can be classified in the following types:

MICRO COMPUTER:
These computers are small in size and cost less.
They are usually designed for personal therefore they are also called Personal Computers.
They are mainly used in homes, schools, offices, shops, banks etc. 
Examples: commodore 64, IBM PC. These computers are given different names according to their usage.

Desktop Computers:
These computers can easily be accommodated on the top of a desk due to their small size. Hence they are also called Desktop Computers.
Laptop Computers:
These computers are small in size and can be placed on the lap. These are battery operated computers and can be carried in briefcase and used anywhere while travelling.
Handheld Computers:
These are the smallest computers, also called PDAs (Personal Digital Assistant). They lack the power of a desktop or Laptop computers, but offer features for users who need limited functions and small size.

MINI COMPUTERS:
These computers are bigger in size than that of Micro computers.
They have a higher processing speed and are costlier than Micro computers.
Several users can use it at the same time.
They are used in banks, universities and in big organizations.
Examples:  PDP-8.

MAINFRAME COMPUTERS:
These computers are very powerful.
They are big in size with a large memory and high speed.
They are designed to tackle huge amount of data.
More than hundred users can use a mainframe computer simultaneously. They are used in networked environment.
Mainframe computers are very expensive and can be used in large business organizations, universities, banks, scientific laboratories, airline/railway ticket reservation, state exchange markets etc.
Example: IBM Z Series, PDP-10 and System Z10.

SUPER COMPUTERS:
They are the most power ful computer with a huge processing speed.
These computers are used for weather forecasting. Space research, satellite control etc.
Example: CRAY-1, CRAY-2, PARAM, ETA A-10 etc.
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