This document classifies computers into different types based on size, work, and purpose. It discusses microcomputers, minicomputers, mainframe computers, and supercomputers as classifications based on size. Based on work, it covers analog computers, digital computers, and hybrid computers. Finally, it describes general purpose computers that can solve a variety of problems by changing programs or instructions, and special purpose computers that are dedicated to solving a single type of problem.

1. CLASSIFICATIONS OF COMPUTERS
• NAME- P. VISHNU KUMAR
• ROLL NO- 22W91A05K6
• BRANCH- CSE
• SECTION – D
• SUBJECT – ELEMENTSOF COMPUTER SCIENCE ENGINEERING

2. CLASSIFICATIONOF COMPUTERANDTHEIRTYPE

3. BASED ON SIZE
a) MICRO COMPUTER
Microcomputers –are the least powerful, yet the most widely used and fastest growing type of computers and are also called
portable computers, Microcomputerconsists of three basic categories of physicalequipment,i.e. system unit, input/outputunit
and memory unit.
b). MINI COMPUTER
Minicomputer– are smaller in size, faster, cost lower than mainframe computers. Initially,the minicomputerWas designed to
carry out some specific tasks, like engineering and ComputerAided design (cad) calculation.They are used as central computer,
which is called as server.
c). MAINFRAME COMPUTER
Mainframe computer – These are the computershaving large internal memory storage and comprehensive range of software.
These computers are bigger in size comparativelyto mini computersbut smaller than supercomputers. Mainframecomputer
serves as a backbonefor the entire business world.
d). SUPER COMPUTER
Supercomputers–are the fastest and most expensive machines. They have high processing speed compared to other
computers. The speed of supercomputersare measured in FLOPS (Floating Point OperationsPer Second) Supercomputersare
used for highly calculationintensivetasks, such as weather forecasting, nuclear research, military agencies and scientific
research laboratories.Supercomputersare most powerful, large in size and memory, compared to all other computers.

4. BASED ON WORK
a).ANALOG COMPUTER
Analog computers–are the job-orientedcomputers. They carry out arithmetic and logical operationsby manipulatingand
processing of data.E.g. speedometers, seismograph, etc. Analog computercan perform several mathematicaloperation
simultaneously.It uses continuousvariablefor mathematicaloperation andutilises mechanicalor electrical energy.
b).DIGITAL COMPUTER
Digital computer- These computers work by calculatingthe binary digits. A digitalcomputer not only performs
mathematicalproblems, but also combines the bytes to produce desired graphics, sounds, e.g. desktop (PC).
c). HYBRID COMPUTER
Hybrid computer- computers are the combinationof analogand digitalcomputers. Machinesused in hospitals like ECG and
DIALYSIS are the commonly used hybrid computer. These computerscontainspecial equipment to convert analog voltageto
digitalvoltage and vice-versa.

5. BASED ON PURPOSE
a).GENERAL PURPOSE COMPUTER
General Purpose Computer- are those computers. Which are used to solve variety of problemsby changing
purpose computersby changing the program or instructions. E.g. to make small database, calculations,
accounting, etc
b).SPECIAL PURPOSE COMPUTER
Special purpose computer- are those computers which are used to solve a single and dedicatedtype of problem.
E.g. automaticaircraft landing, multimediacomputer etc.

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