culated.</td>
  </tr>
  <tr valign="top"> 
    <td><strong>End Of File </strong></td>
    <td>ASCII code 26 is used to indicate the end of MS DOS text files.</td>
  </tr>
  <tr valign="top"> 
    <td><strong>Escape ASCII code 27 </strong></td>
    <td>This character is often interpreted in a special way by programs, VDUs 
      and printers.</td>
  </tr>
  <tr valign="top"> 
    <td><strong>Executable Code </strong></td>
    <td>Non human readable program code executed by the CPU.</td>
  </tr>