CHAPTER 1 Introduction to Computers 4. Why Is a Computer So Powerful 课件

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1、Chapter1IntroductiontoComputersWhyIsaComputerSoPowerful?WhyisaComputersoPowerful?SpeedCircuitsBillionsofoperationsinasinglesecondReliabilityandConsistencyLowfailurerateConsistentresultsAccuracyDependsoninputWhyisaComputersoPowerfulCont.StorageTransferdataquicklySto

2、reenormousamountsofdataCommunicationsComputerscanshareinformationProcessingcyclesInputOutputStorageProcessBenefits-SpeedIncreasedprocessingspeedsallowtaskstobecompletedmorequicklybyfewerpeople.Sendingaletterusingmailmergeusedtobeaboring,timeconsumingtask.Computers,

3、therefore,allowtheorganisationstorespondmorequicklytoclientsneeds.Benefits-StorageLargeamountsofdatacanbeheldoncompactstoragedevices.Thisallowsorganisationstocutdownonofficespace,rentand/orbuildingpurchasecosts.Alsoallowsforcleaner,tidierworkingenvironment.Benefits

4、-ReliabilityandConsistencyDataheldindigitalformcanbeinterrogatedquicklyandflexibly.Ie,searchingforaclientinaparticularlocationiscompletedinstantaneously.Thisleadstobetterqualityinformationwhichimprovesthestandardofdecisionmakingbytheorganisation.Benefits-AccuracyCo

5、mputersprocessalargeamountofdataandproduceerror-freeresultsifdataareinputcorrectlyandtheinstructionsworkwell.Benefits–Communication.Computersalloworganizationstopresentinformationaboutitselfeconomicallyandinavisuallyimpressivemanner.Atthesametime,today’scomputersca

6、ncommunicatewitheachotherandsharethedata.Benefits-NewServicesTheprocessingpowerofcomputersmayenableanorganizationtoprovideservicesthatitpreviouslycouldn’t.Theonlineshoppingfacilitatesmanynetizensandchangesthelifestyleofthewholecommunity.Drawbacks–HealthrisksThelong

7、timecomputerwouldaffectthehealth.Somescientificresearchesindicatethatcomputercouldcausediseaseslikebackaches(腰痛).Drawbacks–ViolationofPrivacyThepersonalinformationisoftenhackedanddisclosed.Thedisclosureofprivacyoncomputerdoesnotonlyrevealthesecrets,butcanalsodamage

8、thepropertyandthesecurity.Drawbacks–PollutionTheproductionofcomputersitselfresultsinthepollution.Meanwhile,iftheelectronicwasteisnotmanagedwell,t