Chapter 3 Operating System Understanding the Platform

Chapter 3 Operating System Understanding the Platform - 1...

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Unformatted text preview: 7/28/2009 1 Black & White Busines Computing 2010 Chapter 3 ♦ Operating Systems: Understanding the Platform Computer Information Systems 105 Operating System: Understanding the Platform Operating Systems An operating system is a collection of computer programs that administer the hardware and software of a computer so they work properly. One of the main tasks of these system programs is to Arizona State University W. P. Carey School of Busines Computer Applications & Information Technology load the operating system (OS) . Many times operating systems are referred to as platforms . Some of the most widely ‐ used platforms are Microsoft Windows , UNIX , Linux , and Mac OS . Most operating system functions run with little or no user interaction. Once an OS (system software) is up and running, the computer user can use application software like Microsoft Excel and Adobe Photoshop. Black & White Busines Computing 2010 Chapter 3 ♦ Operating Systems: Understanding the Platform Computer Information Systems 105 Operating System: Understanding the Platform Processes / Multitasking A job or task a computer performs is called a process . When a computer can run more than one process at a time it is Arizona State University W. P. Carey School of Busines Computer Applications & Information Technology referred to as multitasking . Sharing data from one application software to another without both running at the same time is technically feasible, but very inefficient. Press the “ Alt ” and “ Tab ” keys at the same time to see what applications are running. Black & White Busines Computing 2010 Chapter 3 ♦ Operating Systems: Understanding the Platform Computer Information Systems 105 Operating System: Understanding the Platform Memory Management and Storage Operating systems coordinate and arrange the computer’s memory, which includes cache , random access memory ( RAM ), registers , and virtual memory . The operating system also facilitates disk storage . Arizona State University W. P. Carey School of Busines Computer Applications & Information Technology Memory retains digital data and information in a variety of ways. CPU Cache is small, very quick memory because it stores copies of information and data from the most regularly used parts main memory. CPU cache helps decrease the time it takes to access memory. Random Access Memory ( RAM ) is primary storage. RAM is a type of storage that allows stored data to be accessed in any (random) order without physical movement of the storage media....
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This note was uploaded on 06/16/2011 for the course CIS 105 taught by Professor Mccarthy during the Fall '08 term at ASU.

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Chapter 3 Operating System Understanding the Platform - 1...

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