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1、SomethingaboutComputerTheshortintroductionabouthistoryofcomputerdevelopmentWiththehighpaceofmanufacturedevelopmentandsocietyprogress,countingtoolshavepastaquitelonghistoryfromsimpletocomplex,fromelementarytohighstage,suchasabacus,sliderule,hand-controlmechanicalc
2、omputer,andmotor-drivenmechanicalcomputer.Thefirstelectronicallydigitalcomputerintheworld,namedENIAC,wasbornin1946inAmerica.Itwasconsistedofmorethan18,000electrontube,withahugevolumeof170squaremeterandaweightof30t,eatingupelectricitynearly140kw.Ithasanamazingcalc
3、ulateabilitythatitcanworkout5000timesadditionand300timesmultiplicationinonesecond.Fromtheeyeofcomputer'sdevelopmenttendency,it'spossibletoinventthousandsofbillioncomputerin2010yearsbeforeinUSA.Inshort50years,computerhasgoingthroughfromvacuumtube,transistortoICand
4、VLSI,withmoreconvenientvolume,morepowerfulfunctionandcheaperprice.Nowithasbeenwidelyappliedintheworldanditisonthewaytothenextgeneration,First-generationcomputerThefirst-generationcomputerdevelopedfrom1946until1958.Itusedtobedevotedintoscientificcalculation,onlyin
5、quiteimportantdepartmentsandresearchinginstitutions.It'snotconvenient,withabigvolume,alowspeedandaquitesmallstorage,neitherreasonableprice.Second-generationcomputerThesecond-generationcomputerdevelopedfrom1958until1965.Itsspeedwasnearly100timesfasterthanthefirst,
6、fortransistorintroducedascomputer'scentralparts;thusreducingthevolumetoonefiftieth.Astotheareaofsoftware,computerlanguagewasintroduced.Thesecondnotonlyusedintoscientificcalculation,butalsodataprocessandgeneralaffairs,eveninindustrialcontrolwhichcalledindustrialco
7、mputer.Third-generationcomputerThethird-generationcomputerdevelopedfrom1965until1970.Theelectrondeviceofcomputersaresmallintegratedcircuitatthattime,Computerbecamemoreandmorepopular,suchasinwordprocessing,businessadministration,autocontrolarea.What'smoreamazing,a
8、ftercombinationwithcommunicationtechnology,computerisplungingintomanufacturingmanagement,trafficcontrolandinformationretrieval.Fourth-generationcomputerThefour
