![]() ![]() When the user types a line of text at the operating system command prompt, COMMAND.COM will parse the line and attempt to match a command name to a built-in command or to the name of an executable program file or batch file on disk. Some commands are internal-built into COMMAND.COM others are external commands stored on disk. When an application exits, if the transient portion of the command interpreter in memory was overwritten, DOS will reload it from disk. The command interpreter for DOS runs when no application programs are running.
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