eturn 
      to the right place and there are other uses including doing postfix arithmetic.</td>
  </tr>
  <tr valign="top"> 
    <td><strong>Stack Pointer </strong></td>
    <td>Points to the next free location on the stack. In the RAM displays, the 
      stack pointer is highlighted blue with yellow text. The stack is memory 
      organised as LIFO last in first out. It is used to store return addresses, 
      the CPU state, parameters passed to procedures, results returned from procedures, 
