Input-LaSalleUniversity输入房间大学

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1、InputByHolleeSmalleyWhatisInput?Inputisanydataorinstructionsenteredintothememoryofacomputer.Whatareinputdevices?Aninputdeviceisanyhardwarecomponentthatallowsuserstoenterdataorinstructions.Popularinputdevicesinclude:thekeyboard,mouse,stylus,digitalpen,microphone,digitalcamera,andscanner

2、.ThekeyboardAkeyboardisaninputdevicethatcontainskeysuserspresstoenterdataintoacomputer.Computerkeyboardshaveatypingareathatincludeslettersofthealphabet,numbers,punctuationmarks,andotherbasickeys.Functionkeysareprogrammedtoissuecommands.KeyboardconnectionsDesktopcomputerkeyboardsareusua

3、llyattachedviaacabletoasmallserialport.Acordlesskeyboardisabatterypowereddevicethattransmitsdatausingwirelesstechnology,suchasradiowavesorinfraredlightwaves.KeyboardErgonomicsAnergonomickeyboardhasadesignthatreducesthechanceofwristandhandinjuries.Thegoalofergonomicsistoincorporatecomfo

4、rt,efficiency,andsafetyintothedesignoftheitemsintheworkplace.PointingdevicesApointingdeviceisaninputdevicethatallowsausertocontrolapointeronthescreen.Apointerisasmallsymbolonthescreenwhoselocationandshapechangeastheusermovesapointingdevice.Pointingdevicescont.Amouseisapointingdevicetha

5、tallowsuserstocontrolthemovementofthepointer.Itisthemostwidelyusedpointingdeviceonthedesktopcomputer.Amechanicalmousetranslatesthemovementofaballinitsundersideintosignalsthecomputercanprocess,Anopticalmouseusesdevicesthatemitandsenselighttodetectthemouse’smovement.Acordlessmousetransmi

6、tsdatausingwirelesstechnology.OtherpointingdevicesAtrackballisastationarydevicewithaballthatonerotatestomovethepointer.Atouchpadisaflat,pressure-sensitivedevicethatyouslideyourfingeracrosstomovethepointer.Apointingstickisadevicepositionedonthekeyboardthatyoupushtomovethepointer.Otherpo

7、intingdevicescont.Ajoystickisasteeringwheeltypedevicethatyouturntostimulatedrivingavehicle.Alightpenisalight-sensitivedevicethatyoupressatthescreentoselectanobject.Atouchscreenisatouch-sensitivedisplaydevicethatyouinteractwithbytouchingareasifthescreen.Astylusordigitalpenusespressure