Generation of Generation of ComputersComputers

Introduction to Computer Introduction to Computer Computer GenerationsComputer Generations

Introduction to ComputerIntroduction to Computer

History of Computer History of Computer Functions of Computer Functions of Computer Characteristics of ComputerCharacteristics of Computer

Computer GenerationsComputer Generations

o Meaning of GenerationsMeaning of Generationso Classifications:Classifications: -- First Generation-- First Generation -- Second Generation-- Second Generation -- Third Generation-- Third Generation -- Fourth Generation-- Fourth Generation -- Fifth Generation-- Fifth Generation

First GenerationFirst GenerationGeneration period (1942-1955)Generation period (1942-1955)Key Hardware Technologies:Key Hardware Technologies: -- Vacuum tubes-- Vacuum tubes -- Punched card secondary storage-- Punched card secondary storageKey Software Technologies:Key Software Technologies: -- Machine and assembly language-- Machine and assembly language -- Stored program concept-- Stored program conceptKey CharacteristicsKey CharacteristicsSome Representative Systems:Some Representative Systems: -- ENIAC,EDVAC,EDSAC,UNIVAC-- ENIAC,EDVAC,EDSAC,UNIVAC

Second GenerationSecond Generation Generation period (1955-1964)Generation period (1955-1964) Key Hardware Technologies:Key Hardware Technologies: -- Transistors-- Transistors -- Magnetic core memory-- Magnetic core memory Key Software Technologies:Key Software Technologies: -- Batch operating System-- Batch operating System Key CharacteristicsKey Characteristics Some Representative Systems:Some Representative Systems: -- IBM-7030,UNIVAC LARC-- IBM-7030,UNIVAC LARC

Third GenerationThird Generation Generation period (1964-1975)Generation period (1964-1975) Key Hardware Technologies:Key Hardware Technologies: -- IC-- IC -- Microcomputers-- Microcomputers Key Software Technologies:Key Software Technologies: -- Time sharing-- Time sharing -- Operating system-- Operating system Key CharacteristicsKey Characteristics Some Representative Systems:Some Representative Systems: -- PDP-2,PDP-8-- PDP-2,PDP-8

Fourth GenerationFourth Generation Generation period (1975-1984)Generation period (1975-1984) Key Hardware Technologies:Key Hardware Technologies: -- Microprocessor-- Microprocessor -- Semiconductor-- Semiconductor Key Software Technologies:Key Software Technologies: -- PC-- PC -- GUI-- GUI -- UNIX-- UNIX Key CharacteristicsKey Characteristics Some Representative Systems:Some Representative Systems: -- Apple-2,TRS-80,CRAY-1,CRAY-2,CRAY-X/MP-- Apple-2,TRS-80,CRAY-1,CRAY-2,CRAY-X/MP

Fifth GenerationFifth Generation Generation period (1984-Present)Generation period (1984-Present) Key Hardware Technologies:Key Hardware Technologies: -- Notebook computers-- Notebook computers -- Internet-- Internet Key Software Technologies:Key Software Technologies: -- WWW-- WWW -- Internet based application-- Internet based application Key CharacteristicsKey Characteristics Some Representative Systems:Some Representative Systems: -- Pentium PCs,PARAM-10000-- Pentium PCs,PARAM-10000