中职计算机专业英语03 教学课件 Lesson 7　Various Operating Systems.ppt

《中职计算机专业英语03 教学课件 Lesson 7　Various Operating Systems.ppt》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、计算机专业英语Lesson7VariousOperatingSystemsWordsandExpressionsNotesReadingComprehension译文Lesson7VariousOperatingSystems补充阅读Operatingsystemsareundergoingarapiddevelopmentthroughhistory.Oldgenerationshavebeenreplacedbynewones.TherearevariousoperatingsystemssuchasDOS,

2、MicrosoftWindows,OS/2andUnix,etc.Eachtypehasitsownfeature.Let’slookatthembriefly.Lesson7VariousOperatingSystemsDOSstandsforDiskOperatingSystem.Itwasthefirstwidelyinstalledoperatingsystemonpersonalcomputer.However,itwaslessconvenientforcomputeruserstoworkwith.

3、Ithasseverallimitations.First,itdoesn’tprovideagraphicaluserinterface.Itrequiresatext-basedcommand.Computerusershavetorememberanumberofcommandstoaccomplishtheirtasks.Secondly,DOScanrunonlyoneapplicationatatime.Therefore,ittakesmoretimetofinishaspecifictask.It

4、hasbeengraduallyreplacedbythefamousseriesofWindows.Lesson7VariousOperatingSystemsMicrosoftmadeagreatcontributiontothedevelopmentofoperatingsystems.ItbuiltWindowsasanextensionofthewidelyinstalledDOSoperatingsystem,andgreatlyfacilitatescomputeruser’stasks.Windo

5、wsprovidesnotonlyagraphicaluserinterfacebutalsomemorymanagement.Furthermore,ithasmultitaskingcapacities.ThereareseveralbasicvariationsofMicrosoftCorporation’swindowingprogramsLesson7VariousOperatingSystemsWindows95isamemberofthelargefamily.Itachievesmuchmorep

6、owerandspeedthanDOS.ThemostoutstandingfeatureofWindows95isthatitgivesasimpleandeasyaccesstocommontasksbygraphicalicons.AftertheapplicationofWindows95,Microsoftproducesmanyvariations:Windows98,Windows2000,andWindowsXP,etc.ThemostupdatedoneisWindowsXPwhichhasse

7、veraladvancementsovertheformerones.Lesson7VariousOperatingSystemsThereareotherkindsofoperatingsystemsworthmentioning.OS/2andUnixaregoodexamples.OS/2wasdevelopedjointlybyIBMandMicrosoft.Itwasdesignedmainlyforpowerfulmicrocomputers.Itrequiresalmostthesamesystem

8、configurationasWindows98.UnixmaybenotasfamousasWindowsinpersonalcomputers.Itismainlyforworkstationsandminicomputersinmultiuserenvironment.Lesson7VariousOperatingSystemsWordsandExpressions