You should learn how to use these first. They are the most frequently 
used DOS commands and keyboard commands.

DOS COMMAND	 WHAT IT DOES

    C:            tells DOS the default place to look for files 
                  is disk drive C:
    CD            change which directory is the current directory.
    COPY          copy one file to another file or to the printer.
    DEL           delete any file other than a directory.
    DIR           display the filenames in a directory.
    MORE          display the contents of a file on the screen
                  one screen at a time. 
    TYPE          display the contents of a file on the screen or
		  on the printer.

Keyboard Command WHAT IT DOES

    Ctrl-Alt-Del  reboots the computer.
    Ctrl-Break    breaks (interrupts) the current program.
    Ctrl-NumLock  freezes output to the screen.
    Esc           throws away a partially entered command without
                  executing it and starts entering a new command.
