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1、Ch5InputandOutputI.Ch5InputandOutputLectureOutlineA.Competenciespg1761.Defineinput.2.Describekeyboardentry,pointingdevices,andscanningdevices.3.Discussimagecapturingdevices,digitizingdevices,andaudioinputdevices.4.Defineoutput.5.Describemonitors,printers,andaudiooutputdevices.6.Discusscombinatio
2、ninputandoutputdevices.B.Introductionpg177§ComputerInputandoutputdevicesareessentiallytranslators.§Inputdevicestranslatenumbers,lettersandactionsthatpeopleunderstandintoaformthatthecomputercanprocess.§Outputdevicestranslatethemachinelanguagethecomputercanprocessbackintoletters,numbers,sounds,and
3、imagesthatpeoplecanunderstand.§Competentendusersneedtoknowaboutthemostcommoninputdevicessuchaskeyboards,mice,scanners,digitalcameras,digitizingtablets,voicerecognitiondevices,andMIDI.§Theyalsoneedtoknowaboutthemostcommonoutputdevicessuchasmonitors,printers,andaudiooutput.§Theyalsoneedtoknowabout
4、combinationinput/outputdevicessuchasfaxmachines,Internettelephones,andterminals.C.WhatisInputpg178§Inputisanydataorinstructionsthatareusedbyacomputer.§Theycancomedirectlyfromyouorfromothersources.§Inputdevicesarehardwareusedtotranslatewords,sounds,images,andactionsthatpeopleunderstandintoaformth
5、atthesystemunitcanprocess.D.KeyboardEntrypg178§Keyboardsconvertnumbers,letters,andspecialcharactersintoelectronicsignals.Page26of26Ch5InputandOutput§MostkeyboardshavetheiralphabeticcharactersarrangedinthestandardQWERTYformat(notethefirstsixcharactersonthetoprowofakeyboard).1.Keyboards§Traditiona
6、lkeyboards:full-sized,rigid,rectangularkeyboardsthatincludefunction,navigational,andnumerickeys.§Flexiblekeyboards:foldorrollupforeasypackingandstorageformobileusers.§Ergonomickeyboards:similartotraditional,butdesignedtospecificallyalleviatewriststrainassociatedwithrepetitivemovementsoftyping.§W
7、irelesskeyboards:moreexpensivethantraditionalkeyboards,butgivetheflexibilityofun-tetheringthecord.§PDAkeyboards:miniaturekeyboardsforPDAsforsendingemail,etc.2.Features§Numerickeypads:easierentryofnumbersandarithmeticsymbols§
