计算机英语 教学课件 作者 杨芸 主编 杨 蕾 李连弟 副主编2.ppt

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1、UnitTwoHuman-ComputerInterfacesHuman-ComputerInterfacesIntroductionIncomputerscience，allcommunicationbetweendifferententitiesisdescribedintermsof“interfaces”inthegenericsense.Seetable2.1forthat，we'veseeninterfacesbetween.Table2.1Unite2entitiesthewareinterfacetheprogram

2、merandthecomputerprogramminglanguagesthecomputerandperipheraldeviceshardwareinterfaces，cablesObjectstheirmethodsamethodcallerandthemethodparameterlistsamethodcallerandthemethodparameterlistspackagesandtheirusersAPI'sProgrammersandotherprogrammersExternaldocumentationst

3、hesoftwareapplicationandthehumanuserHuman-ComputerInterface（HCI）Butthereisoneinterfacethatstandsoutfromtherest，becauseitisthemostvisible，andinmanyrespectsthemostimportant.Itistheinterfacebetweenthesoftwareapplicationandthehumanuser.ThisinterfaceisknownastheHuman-Comput

4、erInterface（HCI）.InorderforHCItowork，thesystemneedstohaveinputdevicessuchasmouse，keyboard，touchscreen，microphone，etc.Moreover，thesystemrequiresoutputdevicessuchasmonitor，printer，speaker，etc.Bothuserandcomputersendsandreceivesdataorinstructionsthroughthesedevices.Whatis

5、aGraphicalUserInterface（GUI）?DOS，UNIXandothercommand-lineoperatingsystemshavelongbeencriticizedforthecomplexityoftheiruserinterface.Thisinterfaceevolvedinthelate60'sandearly70'swiththeemergenceoftimesharingasthenewleadingcomputingstyle.Usingterminalsonsharedminicompute

6、rs，UNIXevolvedasetofapplicationsthatsharedacommonon-orientedinterface.Thisinterfacewasrevolutionaryinitstimeforitssimplicityandpower.UNIXintroducedtheconceptoftheshell，acommandinterpreterthatreadcommonlinesfromthekeyboardandexecutedseparateprocessforeachcommand，emerged

7、inthelate70's.InaGUIenvironment，inputoptionstomanycomputerprogramsaredesignedasasetoficons，whicharegraphicsymbolsthatlooklikeprocessingoptiontheyaremeanttorepresent.Usersofsuchprogramsselectprocessingoptionsbyusingamouseorsimilardevicetopointtotheappropriateicon.Inthee

8、arlydayswhenfoolsarguedthatacommand-linestructurewasfasterormoreefficientthanaGUI，TheycalledGUIusersWIMPs-Window，Icon