tag:blogger.com,1999:blog-47020701918660534292023-11-15T06:32:16.151-08:00Operating SystemsAnonymoushttp://www.blogger.com/profile/15365106371058625697noreply@blogger.comBlogger1125tag:blogger.com,1999:blog-4702070191866053429.post-1377801428674731952013-06-05T10:31:00.001-07:002013-06-12T10:17:04.062-07:00<h3>
<span style="font-family: Georgia, Times New Roman, serif;">WHAT IS AN OPERATING SYSTEM?</span></h3>
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<span style="font-family: Arial, Helvetica, sans-serif;">An operating system is a collection of software that manages computer hardware resources and provides common services for computer programs. The operating system is a vital component of the system software in a computer system.</span><br />
<span style="font-family: Arial, Helvetica, sans-serif;">Application programs usually require and operating system to function.</span><br />
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<span style="font-family: Georgia, Times New Roman, serif;"><b>TIME-SHARING OPERATING SYSTEMS</b></span><br />
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<span style="font-family: Arial, Helvetica, sans-serif;">Time-sharing operating systems schedule tasks for efficient use of the system and may also include accounting for cost allocation of processor time, mass storage, printing and other resources.</span><br />
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<span style="font-family: Arial, Helvetica, sans-serif;">For hardware functions such as input and output and memory allocation, the operating system acts as an intermediary between programs and the computer hardware, although the application code is usually executed directly by the hardware and will frequently make a system call to an OS function or be interrupted by it.</span><br />
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<span style="font-family: Arial, Helvetica, sans-serif;">Operating systems can be found on almost any device that contains a computer, from cellular phones and video games consoles to supercomputers and web servers.</span><br />
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<span style="font-family: Georgia, Times New Roman, serif;"><b>TYPES PF OPERATING SYSTEMS: </b></span><br />
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<span style="font-family: Arial, Helvetica, sans-serif;">examples of popular modern operating systems included:</span><br />
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<li><span style="font-family: Arial, Helvetica, sans-serif;">Android</span></li>
<li><span style="font-family: Arial, Helvetica, sans-serif;">BSD</span></li>
<li><span style="font-family: Arial, Helvetica, sans-serif;">iOS</span></li>
<li><span style="font-family: Arial, Helvetica, sans-serif;">GNU/linux </span></li>
<li><span style="font-family: Arial, Helvetica, sans-serif;">OS X</span></li>
<li><span style="font-family: Arial, Helvetica, sans-serif;">QNX</span></li>
<li><span style="font-family: Arial, Helvetica, sans-serif;">Microsoft Windows</span></li>
<li><span style="font-family: Arial, Helvetica, sans-serif;">Windows Phone </span></li>
<li><span style="font-family: Arial, Helvetica, sans-serif;">IBM </span></li>
<li><span style="font-family: Arial, Helvetica, sans-serif;">z/OS </span></li>
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<span style="font-family: Arial, Helvetica, sans-serif;">All these, except Window and z/OS share roots in UNIX.</span></div>
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<span style="font-family: Arial, Helvetica, sans-serif;"><b>iOS</b></span></div>
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<span style="font-family: Arial, Helvetica, sans-serif;"> Is a mobile operating system developed and distributed by Apple.</span></div>
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<span style="font-family: Arial, Helvetica, sans-serif;">it has been extended to support other apple such as the ipod touch.</span></div>
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<span style="font-family: Arial, Helvetica, sans-serif;">The user interface of iOS is based on the concept of direct manipulation, using multitouch gestures. Interface control elements.</span></div>
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<span style="font-family: Arial, Helvetica, sans-serif;"><br /></span>Anonymoushttp://www.blogger.com/profile/15365106371058625697noreply@blogger.com0