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Types of Computer 11th July 2011
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Page 1: Types of computer

Types of ComputerTypes of Computer

11th July 201111th July 2011

Page 2: Types of computer

IntroductionIntroduction

• Computers are classified according to:– Size– Speed– Storage Capacity

• It can be divided into two main groups:– Special Purpose Computer– General Purpose Computer

• Computers are classified according to:– Size– Speed– Storage Capacity

• It can be divided into two main groups:– Special Purpose Computer– General Purpose Computer

Page 3: Types of computer

Special Purpose ComputerSpecial Purpose Computer

• It is designed to do a specific job– e.g. Calculator, Automated Teller

Machine (ATM), Traffic Light, etc

• It is usually expensive

• It is designed to do a specific job– e.g. Calculator, Automated Teller

Machine (ATM), Traffic Light, etc

• It is usually expensive

Page 4: Types of computer

General Purpose ComputerGeneral Purpose Computer• It is designed to do many kinds of

jobs.– e.g. games, word processing, surfing

the net, etc

• It can further classified based on its physical size and computing power.

• It is designed to do many kinds of jobs.– e.g. games, word processing, surfing

the net, etc

• It can further classified based on its physical size and computing power.

Page 5: Types of computer

Types of computer based on its sizeTypes of computer based on its size

• Microcomputer (small)• Minicomputer (medium)• Main Frame (large)

• Microcomputer (small)• Minicomputer (medium)• Main Frame (large)

Page 6: Types of computer

MicrocomputerMicrocomputer

• Single User system– e.g. Desktop

• Means it can be used only one user at a time

• Characteristics– Small in size– Low cost– One User / Single User– Low Computing Power– Commonly used for personal applications

• Single User system– e.g. Desktop

• Means it can be used only one user at a time

• Characteristics– Small in size– Low cost– One User / Single User– Low Computing Power– Commonly used for personal applications

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MicrocomputerMicrocomputer

• Can be classified into:– Desktop PCs

• sits on desks, rarely moved, large and bulky.

• Memory capacity, graphics capacity and software availability vary from one computer to another Used both for business and home applications

• Can be classified into:– Desktop PCs

• sits on desks, rarely moved, large and bulky.

• Memory capacity, graphics capacity and software availability vary from one computer to another Used both for business and home applications

Page 8: Types of computer

– Portable PCs• Can be moved easily from place to place• Weight may varies• Small PCs are popular known as laptop• Widely used by students, scientist,

reporters, etc

– Portable PCs• Can be moved easily from place to place• Weight may varies• Small PCs are popular known as laptop• Widely used by students, scientist,

reporters, etc

Page 9: Types of computer

Uses of MicrocomputerUses of Microcomputer

• Word Processing• Home entertainment• Home banking• Printing• Surfing the internet• etc

• Word Processing• Home entertainment• Home banking• Printing• Surfing the internet• etc

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MinicomputerMinicomputer

• Medium sized computer• Also called the minis

– e.g. IBM36, HP9000, etc

• Computing power lies between microcomputer and mainframe computer

• Medium sized computer• Also called the minis

– e.g. IBM36, HP9000, etc

• Computing power lies between microcomputer and mainframe computer

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Page 12: Types of computer

• Characteristics– Bigger size than PCs– Expensive than PCs– Multi-User– Difficult to use– More computing power than PCs– Used by medium sized business

organizations, colleges, libraries and banks.

• Characteristics– Bigger size than PCs– Expensive than PCs– Multi-User– Difficult to use– More computing power than PCs– Used by medium sized business

organizations, colleges, libraries and banks.

Page 13: Types of computer

Uses of MinicomputerUses of Minicomputer

• Control of Automated Teller Machine (ATMs)

• Payroll• Hospital patients registration• Inventory Control for supermarket• Insurance claims processing• Small bank accounting and

customer details tracking

• Control of Automated Teller Machine (ATMs)

• Payroll• Hospital patients registration• Inventory Control for supermarket• Insurance claims processing• Small bank accounting and

customer details tracking

Page 14: Types of computer

Main FrameMain Frame• Large, fast and expensive computer• Cost millions of dollar

– e.g. IBM3091, ICL39, etc

• Characteristics:– Bigger in size than minicomputers– Very expensive– Support a few hundred users simultaneously (Multi-Users)– Difficult to use– More computing power than minicomputers– Have to be kept in a special air-conditioned room– Used in big business organizations and government

departments

• Large, fast and expensive computer• Cost millions of dollar

– e.g. IBM3091, ICL39, etc

• Characteristics:– Bigger in size than minicomputers– Very expensive– Support a few hundred users simultaneously (Multi-Users)– Difficult to use– More computing power than minicomputers– Have to be kept in a special air-conditioned room– Used in big business organizations and government

departments

Page 15: Types of computer

Areas where mainframes are usedAreas where mainframes are used

• Airline reservation• Big banks with hundreds of branches located all

over the world• Big universities with thousands of enrollment• Natural gas and oil exploration companies• Space Vehicle control• Weather forecasting• Animated Cartoon

• Some mainframes are designed to be extremely fast and called super computers. It is used for space launching, monitoring and controlling.

• Airline reservation• Big banks with hundreds of branches located all

over the world• Big universities with thousands of enrollment• Natural gas and oil exploration companies• Space Vehicle control• Weather forecasting• Animated Cartoon

• Some mainframes are designed to be extremely fast and called super computers. It is used for space launching, monitoring and controlling.

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