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BASIC COMPUTER CONCEPT

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The first tools used for counting were

man's own fingers (digit)

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ABACUSThe first known mechanicalcomputing device invented

by man was the abacus.

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NAPIERS BONE Developed in 1614by John Napier . It

is a computingdevice used formultiplication and

division of largenumbers.

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PASCALINEDevelop in 1642 byBlaise Pascal. It

comes with eightrotating gear witheach wheelrepresenting places inthe decimal system

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J CQU RDS LOOM

It was invented byJoseph MarieJacquard in 1801.

Jacquards Loomuses punch cardsto program designson fabrics andcarpets.

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DIFFEREN E ENGINE

In 1822, CharlesBabbage designed

the DifferenceEngine. It cancompute many useful

sets of numbers

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ANALYTICAL ENGINE

The mechanicalgeneral-purpose

computer which led tothe origination of theAnalytical Engine. Itwas described in 1837but never completed.

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TABULATING MACHINE

Invented by anAmerican inventor,

Herman Hollerith in 1890. This machineuses a punched cardthat can beelectronically read toprocess high volumes ofdata.

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ABC (Atanasoft-Berry Computer)

JohnVincent Atanasoffand Clifford Berryinvented the firstelectronic-digitalcomputer called ABC(Atanasoff-BerryComputer)

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EDVAC ( Electronic Discrete

Variable Automatic Computerautomatically addition,subtraction,

multiplication, programmeddivision and automaticchecking, also developedby John William Mauchlyand John Presper Eckertin 1944.

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ENIAC (Electronic Numerical

Integrator and ComputerIt was the firstelectronic digital

computer which is bigand noisy. It canperform long calculationsin an hour. It was also

developed by Eckert andMauchly.

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It was consideredthe most

expensive andfastest type ofcomputer

SUPERCOMPUTER

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slower, lesspowerful and lessexpensive thansupercomputers. Itcan support

hundreds orthousands of users.

MAINFRAME COMPUTER

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describe thesmall thirdgenerationcomputers

MINICOMPUTER

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Desktop computer isa personal computer(PC) intended for

regular use at asingle location.Desktop modelcomputers are broadand low.

DESKTOP COMPUTER

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Other names forpalmtops arehandheld computers,pocket computers andPDA(Personal DigitalAssistant).

PALMTOP COMPUTER

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Mobile devices aresmall enough tocarry in a pocket.Aside from itstelephonecapability, it isalso internet-enabled.

MOBILE DEVICES

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a special type ofnotebook computer

that allows you towrite or draw on thescreen using a digitalpen or also calledstylus. .

TABLET PC

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Fingers PascalineNapiers

Bone

DesktopComputer

Laptop PalmtopMobile &

Tablet

computer

Abacus

jacquardsloom

DifferenceEngine

AnalyticalEngine

EDVAC ABC

UNIVACSupercomputer

MainframeComputer

MiniComputer

LeibnitzsCalculator

TabulatingEngine ENIAC