+<li><a href="https://www3.svjatoslav.eu/projects/sixth/">Sixth</a> - Parent project.
+<ul class="org-ul">
+<li><a href="https://www3.svjatoslav.eu/projects/sixth-data/">Sixth Data</a> - Data storage and computation engine.
+</li>
+<li><a href="https://www3.svjatoslav.eu/projects/sixth-3d/">Sixth 3D</a> - 3D engine - for user interface and data visualization.
+<ul class="org-ul">
+<li><a href="https://www3.svjatoslav.eu/projects/sixth-3d-demos/">Sixth 3D engine demos</a> - Demonstration of Sixth 3D engine capabilities.
+</li>
+</ul>
+</li>
+</ul>
+</li>
+</ul>
+</div>
+</div>
+<div id="outline-container-sec-5" class="outline-2">
+<h2 id="sec-5"><span class="section-number-2">5</span> Computation ideas</h2>
+<div class="outline-text-2" id="text-5">
+<ul class="org-ul">