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8/6/2019 Clasification of Computers
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COMPUTER SYSTEMSCOMPUTER SYSTEMS
± ± The most powerful computers, used byThe most powerful computers, used bylarge organizations and department withinlarge organizations and department within
organizations are microcomputers,organizations are microcomputers,
midrange computers, mainframes and themidrange computers, mainframes and the
super computers.super computers.
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CATEGORIES OF COMPUTER SYSTEMCATEGORIES OF COMPUTER SYSTEM
MICRO COMPUTER MICRO COMPUTER
MIDRANGE COMPUTER SYSTEMMIDRANGE COMPUTER SYSTEM
MAINFRAME COMPUTERSMAINFRAME COMPUTERS
SUPER COMPUTERSSUPER COMPUTERS
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Types of Micro computersTypes of Micro computers
1.1. Personal Computer : PCs are easier to use andPersonal Computer : PCs are easier to use and
affordable than work stations. PCs are developedaffordable than work stations. PCs are developed
generally as desktop or portable machines.generally as desktop or portable machines.
2.2. Work stationsWork stations--Technical work stations thatTechnical work stations thatsupport applications with heavy mathematicalsupport applications with heavy mathematical
computing and graphics display demand such ascomputing and graphics display demand such as
computer aided design in engineering or computer aided design in engineering or
investment portfolio analysis in the securitiesinvestment portfolio analysis in the securitiesindustry.industry. Super micros are the powerful work Super micros are the powerful work
stations e.g.stations e.g.-- Sun , Apple , HP, NeXTSun , Apple , HP, NeXT..
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Mid Range Computer SystemMid Range Computer System
These computer were first known as minicomputers for These computer were first known as minicomputers for
scientific research , instrumentation systems, engineeringscientific research , instrumentation systems, engineering
analysis, and industrial process monitoring and control.analysis, and industrial process monitoring and control.
The more powerful minicomputers are called Superminis.The more powerful minicomputers are called Superminis.
They are not so powerful as mainframes, but less costly toThey are not so powerful as mainframes, but less costly to
buy, operate and maintain and thus meet the computing buy, operate and maintain and thus meet the computing
needs of organizations.CPU Speed is 100Kips to 500 Mipsneeds of organizations.CPU Speed is 100Kips to 500 Mips
. Ex. Honeywell , Datapoint.etc. Ex. Honeywell , Datapoint.etc
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Characteristic of MinicomputersCharacteristic of Minicomputers
Smaller CPU than a mainframe.Smaller CPU than a mainframe.
Word length are usually 16Word length are usually 16--32 bits.32 bits.
Supports between 15 to 25 Terminals.Supports between 15 to 25 Terminals.
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Mainframe computersMainframe computers
These are large computers built to a conventionalThese are large computers built to a conventional
architecture. These can process several millionarchitecture. These can process several million
instruction per record. Large organizations useinstruction per record. Large organizations usethese machines to handle wide array of data suchthese machines to handle wide array of data such
as banks, insurance companies ,airlines, railwayas banks, insurance companies ,airlines, railway
reservation, space research organization .reservation, space research organization .
Mainframe term was originally referred to theMainframe term was originally referred to thecabinet in a large computer cabinet in a large computer system.Exsystem.Ex. IBM 4300. IBM 4300
Series , Honeywell 60 series.Series , Honeywell 60 series.
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Super Computer Super Computer
The speed and power of super computers, the fastestThe speed and power of super computers, the fastest
class of computers, are almost beyond humanclass of computers, are almost beyond human
comprehension, and their capabilities arecomprehension, and their capabilities are
continuously being improved. The term super continuously being improved. The term super
computer describes a category of extremelycomputer describes a category of extremely
powerful computer systems specially designed for powerful computer systems specially designed for
scientific, engineering and business applicationsscientific, engineering and business applications
requiring high speeds for massive numericrequiring high speeds for massive numeric
computations.computations. Ex.param8000,param10000 etc .Ex.param8000,param10000 etc . It¶sIt¶s
cost is from 5 million to 50 million dollar.cost is from 5 million to 50 million dollar.