This requires the user to type specific commands at a prompt. You may also need to use this system, for example, when changing your password, and you can enter DOS by choosing 'MS-DOS Prompt' from the Windows 95 Start menu. Commands may be typed in upper or lower case. Here, they are specified in upper case to distinguish them from other input.
Commands have a particular format.
Parameters Many commands can take extra information called parameters to make them more specific, For example, the COPY command can have a parameter specifying a file to be copied and a parameter specifying a file to which the copy is to be made. Parameters can sometimes be omitted in which case a default action will apply. Options Commands can also be qualified by the use of options. A simple example of the use of an option is with the DIR command. Some Useful DOS Commands COPY Make a copy of a file or merge files together.