</td>
    <td>Ctrl+S and Ctrl+O are examples of hot keys. These give quick access to 
      menu options. Ctrl+S gives the File Save command. Ctrl+O gives the File 
      Open command.</td>
  </tr>
  <tr valign="top"> 
    <td><strong>I Flag </strong></td>
    <td>The I or interrupt flag in the status register indicates if the CPU will 
      accept or ignore hardware interrupts. The commands CLI and STI clear and 
      set this flag. Hardware interrupts are used to signal events like &quot;Key 
