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Createdby:

Mallikarjun.k.l


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1stgeneration of computer

2ndgeneration of computer

3rdgeneration of computer

4thgeneration of computer


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introduction

The term computer generation is after use in relation tothe hardware of computer. each phase of computer

development is known as separate generation o f computer.each phase of development is characterized by type ofswitching circuits it utilizers.Most computer today use the idea of stored program.computer that was proposed by dr.jhon von neumann in

1945. The von neumann architecture is based in three key concept that are:1)Data and instruction (program) are stored in a single read write memory.2)The memory content are addressable by location.3)Excution takes place in sequnentional fashion.


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The first generation[1949-55]The first generation of computer used the vaccume tube & machine languagewas used for giving instruction first generation of computer used the stored programThe fist computer of this generation is very large in size & their was difficult task


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Key features of first generationused the vaccume tube

Big computers

Electrically consumption is high

Large acs were necessary because computerheat


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1956-65:1956-65 The second generation computer began with the advent transistorized

circuitry, invention of magnetic core & development of magnetic disk storagedevicer.These new development made these computer more reliable. TheseIndustries in the applications like Marketing, Production planning etc. THE

SECOND GENERATION

The second generatio


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Transistor replaced vaccume tubes. Small in size.Less amount of heat was generated.Core memory was developed. First operating system was developed. Programming was in machinelanguage as well as assembly language.

Key features of second generation


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[1966-1975]:[ 1966-1975] The third generation of computer replaced transister with Integratedcircuits popularly known as chips. The IC was inverted by Jack kilby at Texas Instrumentin 1958.The third generation computer using integrated circuit Proved to be highly

reliable,relatively expensive & faster. THE THIRD GENERATION


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Some key feature of third generation::Some key feature of third generation:Integrated circuits developed. Power

consumption was low. Computer were smaller,faster & more reliable. High level languages(HLL) appeared.


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[1976-Present]:[1976-Present] The advent of themicroprocessor chip marked the beginning ofthe fourth generation computer. Very LargeScale Integrated (VLSI) circuits packing about50,000 transistor in a chip. The Hard disks are

also available of the size up to 80 GB.For largerdisks RAID technology give to storagehundreds of GB. The CD ROM also becomingpopular day by day. The CD ROM of today canstore up to 650 MBS information. THE FORTHGENERATION


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Some key features of forth generation::Some key features of forth generation:Integrated circuits smaller & faster. Portable

computer developed. Great development indata communication. Different types ofsecondary memory with high storage capacity& fast access developed.


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[Coming Generation]:[ Coming Generation] Fifth Generationcomputing devices based on artificialintelligence, are still in development. The goal

of fifth generation computing is to developdevices that response to natural languageinput & are capable of learning & selforganization. THE FIFTH GENERATION


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Some key features of fifth generation::Some key features of fifth generation: ParallelProcessing was done. Super conductors wereused. Many processors are grouped to

function as one large group processor. A superconductor is a conductor through whichelectricity can travel without any resistanceresulting in faster transfer of informationbetween the components of computer.

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