ces a symbolic dump.
        </li>
        <li>
          <b>I1MACH</b> returns integer machine dependent constants.
        </li>
        <li>
          <b>J4SAVE</b> saves and recalls global variables.
        </li>
        <li>
          <b>NUMXER</b> returns the most recent error number.
        </li>
        <li>
          <b>TIMESTAMP</b> prints out the current YMDHMS date as a timestamp.
        </li>
        <li>
          <b>XERABT</b> aborts program execution.
        </li>
        <li>
          