DOS online help - technical definition

Starting with DOS 5, online help is available from the DOS prompt. For example, in DOS 5, to see a summary of syntax and switches for the Xcopy command, type:

         help xcopy  or  xcopy /?

To display a list of all DOS commands, type help by itself.

Starting with DOS 6, there are two kinds of help. Typing help loads a help system with hypertext links to related commands. To load the system and immediately go to a specific command, type the name of the command; for example, help xcopy. Typing xcopy /? will generate a summary help screen as it does in DOS 5.

In Windows 95, the DOS help was eliminated.