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1、KnowingComputerHardwarefromBuyingThefirstthingyoushouldbeawareofwhenbuyingacomputeristhatvendorsandcomputerpeopledon'tuseEnglishtodescribecomputers.TheyuseagreatdealofjargonthatyouneedtobeabletotranslateintoEnglishifyouaretomakeaninformeddecisionwhenb
2、uyinganewcomputer.Thenextthingtoknowisthatanycomputeryoubuywillbetechnologicallyobsoletein,atmost,twoyears.Whatdoes"technologicallyobsolete"mean?Itmeansthattwoyearsafteryoubuyacomputer,computerswillbebetter,fasterandlessexpensive.Technologyisevolvings
3、ofastthatthereisnowayaroundthis.Butwedidn'tjustsay"obsolete"becauseyoudon'tneedtoupdatetothenewesttechnologydaybydaytohaveacomputerthatservesyourneeds.Althoughthecomputeris,byallreasonablestandards,obsolete,itstillperformsallthefunctionsyouneeditforat
4、homewithreasonablespeedandefficiency.Sowhatdoesthisallmean?First,thatitisnearimpossibletowaitfortherightcomputertocomedowninprice—becausebythen,someonewilltellyouthatthecomputeryou'vebeenwaitingforis,youguessedit,obsolete.Andtheywon'tbelying.Second,yo
5、ucangetacomputerthatwillfulfillallyourneedsforareasonablepricenow.OfPentiumsand486s,ofSXs,DXsandMHzThefirstwordsoutofthemouthofvendorswillusuallybeone,oracombinationof,thewordsabove.Theyrefertotheprocessorspeedandstrength.Thusyou'llhear"thisisa486DX,6
6、6megahertz"or"it'sa133megahertzPentium"or"Thisone?Oh,well,it'safantasticdealfora286SX/24...."Theprocessor(a.k.a.CentralProcessingUnitorCPU)isthepartofthecomputerthatdoesallthework.Formostpeople,themostimportantqualityoftheprocessorisitsspeed—whichisre
7、latedtoitsstrength.Early(notdawnoftimeearly,butearlyenoughforourpurposes)computershad286processors.386sreplacedthoseandweretopofthelineforawhile,until486scameout.NowthetopofthelineisthePentium(since"pent"isLatinforfive,itmakesalittlesense).Thenumbersa
8、ren'timportanttounderstand(andinfact,oftenyou'llseethewholenumberwhichlookslike80286,80386,etc.—usuallywejustchopoffthe80).Justknowthatyoudon'twanta486,butyou'dbebestoffwithaPentium.DX/SXreferstowhetherthecomputerhasamathcoprocessorthatallowst
