est use of the hardware resources and to minimise delays 
      to processes and users.</td>
  </tr>
  <tr valign="top"> 
    <td><strong>Sign bit</strong></td>
    <td>The leftmost bit in a binary number that is used to indicate if the number 
      is positive or negative.</td>
  </tr>
  <tr valign="top"> 
    <td><strong>Sign Flag </strong></td>
    <td>This is set if a calculation gives a negative result.</td>
  </tr>
  <tr valign="top"> 
    <td><strong>Signed Numbers</strong></td>
    <t