Types of Computer Systems

 Types of  Types Computer Systems  T.. Vinothraj  T Lecturer in Computer Science Eastern University Sri Lanka

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1. Classication base on operational principle 

!nalo" Computer

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$i"ital Computer

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%ybri Computers

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Classication base on operational principle 

Analog Computer 

!nalo" computers are the rst computers bein" evelope

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!n analo" computer is a form of computer that uses continuous physical phenomena such as electrical' mechanical' or hyraulic (uantities to moel the problem bein" solve

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!nalo" computers are use to process analo" ata. !nalo" ata is of continuous nature an )hich is not iscrete or separate.

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!nalo" computers are )iely use for certain speciali*e en"ineerin" an scientic applications' for calculation an measurement of analo" (uantities.

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 The analo" computer has become obsolete type of computer these ays.

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Classication base on operational principle 

Digital Computer 

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! computer that performs calculations an lo"ical operations )ith (uantities represente as i"its' usually in the binary number system

Hybrid Computers 

! combination of computers those are capable of inputtin" an outputtin" in both i"ital an analo" si"nals. ! hybri computer system setup o,ers a cost e,ective metho of performin" comple- simulations.

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&. Classication base on Computer si*es an po)er 

Computers can be "enerally classie by si*e an po)er as follo)s /thou"h there is consierable overlap0 

ersonal computer

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2orkstation

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3inicomputer

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3ainframe

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Supercomputer

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Supercomputer 

!n e-tremely fast computer that can perform hunres of millions of instructions per secon.

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Very e-pensive

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Employe for speciali*e applications that re(uire immense amounts of mathematical calculations

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5or e-ample 

)eather forecastin"

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scientic simulations'

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nuclear ener"y research

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6ui ynamic calculations'

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analysis of "eolo"ical ata

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Supercomputer 

E-ample8 Titan  The fastest supercomputer in the )orl is use to stuy alternative ener"y resources an climate chan"e simulations in a "lobal level.

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3ainframe 

! po)erful multi:user computer capable of supportin" many hunres or thousans of users simultaneously.

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! very lar"e an e-pensive computer

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;n some )ays' mainframes are more po)erful than supercomputers because they support more simultaneous pro"rams.
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3ainframe

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3inicomputer 

3ini computers like the mainframe computers are use by business or"ani*ation.

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! multi:user computer capable of supportin" up to hunres of users simultaneously.

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a misi*e computer

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 2orkstation 

! )orkstation is like a personal computer' but it has a more po)erful microprocessor an' in "eneral' a hi"her:(uality monitor.

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! po)erful' sin"le:user computer

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Use for en"ineerin" applications /C!$@C!30' esktop publishin"' soft)are evelopment

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 The most common operatin" systems for )orkstations are UA;B an 2ino)s AT. )orkstations are typically linke to"ether to form a local:area net)ork' althou"h they can also be use as stan:alone systems.

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Server 

! computer that has been optimi*e to provie services to other computers over a net)ork. Servers usually have po)erful processors' lots of memory an lar"e har rives. The ne-t type of computer can ll an entire room.

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Embee system 

!n embee system is a computer system )ith a eicate function )ithin a lar"er mechanical or electrical system' often )ith real:time computin" constraints.

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;t is embee as part of a complete evice often incluin" har)are an mechanical parts. Embee systems control many evices in common use toay.

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3icrocomputer@ersonal Computers 

! small' sin"le:user computer base on a microprocessor

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! small' relatively ine-pensive computer esi"ne for an iniviual user

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Use for )or processin"' accountin"' esktop publishin"' an for runnin" spreasheet an atabase mana"ement applications.

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ersonal Computer Types 

Cs8 T)o basic 6avors of chassis esi"ns 

$esktop moels an To)er moels

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ersonal Computer Types 

Laptops 

!lso calle notebooks

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Laptops are portable computers that inte"rate the isplay' keyboar' a pointin" evice or trackball' processor' memory an har rive all in a battery: operate packa"e

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ersonal Computer Types 

Aetbook  This is similar to a laptop' the only i,erence bein" that it is smaller in si*e' )hich makes it even more portable. ;t is also less e-pensive an performs the basic functions' but its internal parts are not as po)erful as a esktop or laptop.

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ersonal Computer Types 

 Tablet computers 

! tablet computer is a mobile' (uite thin evice' havin" a 6at surface. The evice can be easily hel in your han.

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;t contains a touch screen )hich is operate usin" your n"ers in various )ays such as tappin"' ouble tappin"' s)ipin" an pinchin".

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ersonal Computer Types 

Smartphones 

 These are true multifunctional evices. Duite recently the mobile phone has evelope into )hat is no) calle a smartphone.

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ersonal Computer Types 

2earable Computer 

 The latest tren in computin" is )earable computers. Essentially' common computer applications /e:mail' atabase' multimeia' calenar@scheuler0 are inte"rate into )atches' cell phones' visors an even clothin".

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+. Classication base on the urpose 

!ccorin" to purpose' computers are either "eneral purpose or specic purpose.

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General purpose computers are esi"ne to perform a ran"e of tasks. They have the ability to store numerous pro"rams' but lack in spee an eFciency.

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Special purpose computers are esi"ne to hanle a specic problem or to perform a specic task. ! set of instructions is built into the machine. 

often attache to sensors to measure an@or control the physical environment

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E.".8 The processor use to control an !eroplane' missile

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 Types of Computers: Summary Digital compute rs

Purpose wise

Specia General l Purpos Purpos e Comput e ers

Analog computer s

Hybrid compute rs

Si!e " per#ormance wise

Micro Server Workstat Mini Main Super Comput Comput ion Compu rame Comput ers ers Compute ter er r

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 ThanksG