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<h1><a href="index.html">APT</a> User Guide</h1>

<h2> Appendices </h2>
 
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<h2>Contents</h2>

<ul>
<li><a href="#Trk file contents">Trk file contents</a></li>
<li><a href="#Glossary">Glossary</a></li>



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<h2><a id="Trk file contents">Trk file contents</a></h2>

<p>Each .trk file contains the following vari