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cs1101_09A_lec11 - of supporting thousands users at the...

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CS1101 - Lec01 1 File Management In PCs In Windows , a file is represented by a nam e and an icon Extension - a string of (usually) three charact ers Follows a period (.) at the end of file name Gives more information about the file's origin or us e Files can be organized into collections using f olders ( directories ) The OS allows you to do:
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CS1101 - Lec01 2 Categories of Computers What are the categories of computers now adays? Super-computers Mainframes Workstations and personal computers Portable computers and mobile devices Game consoles Embedded computers
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CS1101 - Lec01 3 Supercomputers Supercomputers The fastest, most powerful, most expensive computers at the time of its construction Used for specialized application that require huge amounts of ma thematical calculations such as weather maps, construction of at om bombs, finding oil, earthquak e prediction, etc. Example: A Blue Gene with 213,000 proc essors
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Mainframes Mainframes Very large and expensive computers capable of supporting thousands users at the same tim
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Unformatted text preview: of supporting thousands users at the same tim e – Used by large organizations, such as banks a nd airlines, for big computing jobs CS1101 - Lec01 4 CS1101 - Lec01 5 Workstations and PCs • Workstations – A type of computers used for ap plications that require a large a mount of computing power and relatively high quality graphics c apabilities • Personal computers – A type of computers whose pric e, size, and capabilities make it suitable for personal usage – Two most popular kinds PC and compatibles use the Microsoft Windows OS Apple Macintosh uses the Macintosh OS CS1101 - Lec01 6 Portable Computers and Mobile Devices • Notebook computers – Portable, small enough to fit on your lap ( laptop ) – Generally more expensive than a deskt op computer • Mobile devices – Small enough to carry in a pocket or hol d in your hand • Handheld computers • PDA (personal digital assistant) • Smart phone • Portable media players...
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