This slide is related classification of computer... Classification of computer related with the classification of computer in different level.....

1. (Types) Classification of Computer System
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2. Types of Computer
 On the basis of work
 On the basis of Size
 On the basis of Brand
 On the basis of Model
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3. On the Basis of Work
 On the basis of Work computers are classified in to three types:
1. Analog : Analog computers are those computers which measure physical and
natural value like voltage , temperature, current and pressure. These
computers are works on continuous data only.
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4. On the Basis of Work
 Digital : Digital computers are those computers which count the discount
data only. They convert data in to digit which is (0 and 1) These computer are
much faster then analog computers and far accurate.
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5. On the Basis of Work
 Hybrid : Those computer which is combination of analog and digital
computer it means it can perform both functions which are performed by
analog and digital computer.
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6. Difference Between Analog & Digital
Computers
Analog Digital
Analog computer works
with natural values and
physical values
1 Digital computer works with digits
Accuracy of analog
computer is low
Accuracy of digital computer is high
They do not have there
own memory
They have there own memory
They are used special
purpose only
They used general purpose
Cost of analog computer
is low
Cost of digital computer is high.
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7. On the Basis of Size
 Supercomputer: Supercomputers are most powerful and expensive computer. They
have large storage capacity and processing speed is at least 10 times faster then other
computers. These computers are maintained and operated by computers engineers
only. It can calculate about 400 millions of bytes per second. they are used in ,weather
forecasting, petroleum and medicine etc. for e.g. Cyber 205.
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8. On the Basis of Size
 Mainframe computer: They are medium or large computer made of
several units connected together. They are generally used in big organization
for large scale data processing. there speed is vary from computer ranging to
million of bytes per second..
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9. On the Basis of Size
 Minicomputer: They are like a small mainframe computers. They consist of a few
separate units connected together. These computers can operated by people who is
not computer expert. They can process information at the rate of 4 million bytes per
second. They are used in small organization.
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10. On the Basis of Size
 Micro computer: They are smallest general purpose computer. They are about the
same size of typewriter. They contain small CPU which called microprocessor. They are
used in different area of application like school, college, banking etc.
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11. On the Basis of Brand
 IBM PC: It stand for international business machine . IBM is one of the leading
company of the world in manufacturing mainframe computers. Which was established
in 1924 in USA. The computer manufactured by IBM company is called IBM computer
and . The microcomputer manufactured by IBM company is called IBM PC.
 IBM Compatibles: A computer that has the same functional and characteristics
and principle of IBM computers is called IBM Compatibles. This computer easily run all
the software which run on the IBM pc. These computers are cheaper and popular
because its all parts are easily available in the market.
 Apple and Macintosh: The computer manufactured by Apple company is called
Apple computers. This company was established in 1970 in USA. The apple computer
have there own hardware and software, they does not support other hardware and
software. The advance version of apple computer is called Macintosh.
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12. On the Basis of Model
 XT computer: It stands for Extended Technology. Those computers which have
8086,8088 microprocessor they are called XT computers. There processing speed is
4.77MHz and they cannot run advance version software.
 AT computer: Advance computer. Those computers which have 80286
microprocessor is called AT computers . These computers are faster then XT computer.
They can run advance version of software because they contain more RAM then XT
computers.
 PS/2: Personal system 2.. IBM company started manufacturing next model of
computer in 1990 this model is called ps/2 computer. They are small in size , they can
run any type of software they are portable in size for eg laptop, notebook etc.
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