r. 
      See INT.</td>
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    <td><strong>IO </strong></td>
    <td>Short for Input Output. See IN and OUT</td>
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    <td><strong>Least significant bit</strong></td>
    <td> LSB. The right hand bit in a byte which is worth 0 or 1.<br>
      MSB. The left hand bit in a byte which is worth 0 or 128.<br>
      Least and Most significant bits.</td>
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    <td><strong>LIFO</strong></td>
    <td>See Stack.</td>
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