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Table Of Contents  CertiGuide to A+ (A+ 4 Real)
 9  Chapter 1: What are Operating Systems and How Do They Work?

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CDI System Commands

The most basic yet very powerful Operating System known as DOS (Disk Operating System) will be examined in this chapter because the DOS environment is still present in Windows 95 and 98, and the commands work in the MS-DOS window in those versions of Windows. Although the 2003 CompTIA A+ objectives no longer require knowledge of DOS as an operating system in its own right, they do require knowledge of Windows 95 and 98. Because both of those operating systems actually run on top of DOS (in other words, they require a full installation of DOS to function correctly as opposed to Windows NT, 2000 or XP, which do not), an understanding of DOS is still very important.

Additionally, the commands that work in DOS also work when used at the NT, 2000 and XP Command Prompt, making DOS command line knowledge a valuable thing to have in your toolbox. The various methods of using DOS as a troubleshooting tool as well as learning what really goes on under the hood will be covered here.

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