re).</li>
        <li>Sequence line, typically short (35-350 bps).</li>
        <li>Plus sign (separator).</li>
        <li>Quality of each base, encoded as ASCII characters<br />
            (<tt>a</tt> means that the machine is 99.97% confident.)
    </ol>
  </div>
  <div class="slide">
    <h2>Some Technical Complications</h2>
    <ul>
        <li>Header may have structure.</li>
        <li>Sequences may not all be of same size.</li>
        <li>There are two sub-formats (ways of encoding qualities).</li