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ID:48031646
大小:780.50 KB
页数:8页
时间:2020-01-13
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1、computer’sIntroductionWhataComputerDoesComputerIntroductionAgeneral-purposemachinethatprocessesdataaccordingtoasetofinstructionsthatarestoredinternallyeithertemporarilyorpermanently.Thecomputerandallequipmentattachedtoitarecalledhardware.Theinstructionsthattellitwhattodoarecalled
2、"software."Asetofinstructionsthatperformaparticulartaskiscalleda"program"or"softwareprogram."WhataComputerDoesInput/OutputStorageCalculateCompare&CopyInput/OutputThecomputercanselectivelyretrievedataintoitsmainmemory(RAM)fromanyperipheraldevice(terminal,disk,tape,etc.)connectedto
3、it.Afterprocessingthedatainternally,thecomputercansendacopyoftheresultsfromitsmemoryouttoanyperipheraldevice.Themorememoryithas,themoreprogramsanddataitcanworkwithatthesametime.StorageByoutputtingdataontoamagneticdiskortape,thecomputerisabletostoredatapermanentlyandretrieveitwhen
4、required.Asystem'ssizeisbasedonhowmuchdiskstorageithas.Themoredisk,themoredataareimmediatelyavailable.CalculateThecomputercanperformanymathematicaloperationondatabyadding,subtracting,multiplyinganddividingonesetwithanother.Compare&CopyThecomputercananalyzeandevaluatedatabymatchin
5、gitwithsetsofknowndatathatareincludedintheprogramorcalledinfromstorage.Thecomputercanmovedataaroundtocreateanykindofreportorlistinginanyorder.TheIntroductionisover.thankyou!
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