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DOS System Overview

In This Section We Will Be Learning The Following Topics


The remainder of this section provides an overview of DOS and DOS commands. Specially, information about the following topics are provided.

  • The structure of DOS
  • A DOS command summary
  • The name that DOS uses to address the different computer input/output devices
  • The way that your keyboard interacts with DOS
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Wild Cards and Literals: Now that you understand filename rules, you should understand the use of two convenient tools: wild cards and literals. Wild Cards: In the card game poker, a wild card may be any card that a player chooses. Forexample, if deuces are "wild," a player can make three kings by using two kings and a deuce. In DOS, an asterisk (*) character is "wild." The asterisk stands for one or more characters in a filename or extention, beginning with the asterisk position. If only an asterisk is used, it represents the entire filename. A few examples are in order. If you wish to list a directory of all files having the extension COM, you can type the command DIR *.COM and press Enter. Every filename with the extension COM is listed. If you want to list a directory of every file beginning with the letter W, you can use the command DIR W *.*. Every filename beginning with W and having any extension is listed. Therefore, the wild card lets you select a set ...