what are the main purposes of an operating system?

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• what are three main things that operating system handles
• Apple's operating system to write out what language?My question is,Mac OS X operating system is what computer language written by?
• what are the main purposes of an operating system?
• What are the functions of operating system?请回的帮我用英语回答这个问题.
• 请高手帮我译一下下面的计算机英语,one advantage of.net is that it provides a lot more security than the .base windows operating system:the managed environment is often referred to as a "sandbox" where applications can only do what they're authorized and authenticated to do.the.net framework is also fast,efficient,and multi-language,meaning that you can write applications in a number of languages,including visual basic,and c#,which is a newlanguage that combines the pr
• 英语翻译The design phase defines how the system will accomplish what was defined in the analysis phase.In the design phase,the system are determined,and the design of the files and/or the datebases is completed.Today,the design phase uses a very well-established principle called modularity.The whole package is divided into small modules.Each module is designed and tested and is linked to other modules through a main program.The design phase uses several t
• Apple's operating system to write out what language?
• I.Answer the following questions,and you may find the answers in the texts of Unit Two:1.What has been the central role of the IMF?2.How have been the working purposes of the World Bank changed in its history?3.What kind of policies shall the OECD promote?4.What are the two main principles aimed at by GATT?And please explain them briefly.II.Translate the “the main agreements of the Uruguay Round”in Page 52.
• what are the main purposes of an operating system?
• what are three main things that operating system handles
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• What are the functions of CET4?