To recall previously entered NCL commands, press the up-arrow
    key. After recalling an NCL command, modify it by using <Ctrl/A>
    to switch between insert and overstrike modes of editing. You
    can also use the <Delete> key to edit a command line. Reenter the
    command by pressing the <Return> key. Press the down-arrow key to
    recall the next (most recent) command in the NCL command recall
    buffer.

    For Tru64 UNIX, you can recall commands by string by starting the
    line with a '^' or by ending a line by pressing the <Find> key,
    for example:

    ncl> ^ena  <Return>
    or
    ncl> ena  <Find>

    Will recall the last command that started with "ena."