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Unit2.HardwareSystemsThisunitcoverscomputerhardware—thecomponentsthatmakeupacomputersystemandhowtheyworktogether.First,youwilllearnabouthowthecomputerprocessesinformationandhowmemoryworks.Thenyouwilllearnabouthowdatacanbemovedamongcomponentsinsideandoutsidethesystemunit.Youwillalsobecomefamiliarwithdifferentmediaforstoringdata.Bytheendofthisunit,youshouldhaveabasicunderstandingofhowacomputerworks.Understandingthisunitwillalsohelpyoubecomeaninformedconsumerofcomputerequipment.ReadingSequence:HYPERLINK"javascript:ContentByName('pg-proc-and-mem');"2.1ProcessorandMemoryHYPERLINK"javascript:ContentByName('pg-peripherals');"2.2PeripheralsHYPERLINK"javascript:ContentByName('pg-storage-devices');"2.3StorageDevicesHYPERLINK"javascript:ContentByName('pg-putting-together');"2.4PuttingTogethertheHardwareComponentsHYPERLINK"javascript:ContentByName('pg-improving-computer');"2.5ImprovingComputerPerformanceAssessments:HYPERLINK"javascript:AssessmentByName('assm-exer-hardware-sys');"Exercise2Toguideyouthroughthehardwarecomponentsthatwillbecoveredinthisunit,thediagrambelowillustratesatop-levelviewofthecomponentsinacomputersystem.Figure1ComponentoverviewThemicroprocessor,alsocalledtheprocessor,isthemaincomponentthatexecutesinstructionsstoredinthemainmemory.Themicroprocessorissometimesreferredtoasthe"brain"ofthecomputersystem,makingdecisionsandsendingcommandstotheothercomponentstocompleteasetofinstructions.Themainmemorystoresinstructionstobeexecutedbythemicroprocessor.Thedatastoredinmainmemoryislostwhenthecomputeristurnedoff.Incontrasttomainmemory,storagedevicessuchasCD-ROMdrivesandfloppydiskdrivesstoredatapermanentlyevenwhenthecomputeristurnedoff.Peripheralsenabledatainputandoutput.Examplesofperipheraldevicesincludethemonitor,theprinter,thekeyboard,andthemouse.Theperipheralsalsoincludemechanismsthatallowdatatobetransferredinandoutofacomputersystem.Thechipsetactsasthetrafficcopcontrollingtheflowofdataandcoordinatinginteractionsamongcomponentsinthesystem
