Described the used technologies for each of the visualizations

docs/graph2d.html

@@ -24,6 +24,10 @@
   You can freely move and zoom in the graph by dragging and scrolling in the
   window.
 </p>
+<p>
+  Graph2d uses HTML DOM and SVG for rendering. This allows for flexible
+  customization using css styling.
+</p>
 
 <h2 id="Contents">Contents</h2>
 <ul>

docs/graph3d.html

@@ -18,8 +18,11 @@
 <p>
   Graph3d is an interactive visualization chart to draw data in a three dimensional
   graph. You can freely move and zoom in the graph by dragging and scrolling in the
-  window.
-  Graph3d also supports animation of a graph.
+  window. Graph3d also supports animation of a graph.
+</p>
+<p>
+  Graph3d uses <a href="https://developer.mozilla.org/en-US/docs/Web/HTML/Canvas">HTML canvas</a>
+  to render graphs, and can render up to a few thousands of data points smoothly.
 </p>
 
 <h2 id="Contents">Contents</h2>

docs/network.html

@@ -25,7 +25,9 @@
 <p>
   The network visualization works smooth on any modern browser for up to a
   few thousand nodes and edges. To handle a larger amount of nodes, Network
-  has <a href="#Clustering">clustering</a> support.
+  has <a href="#Clustering">clustering</a> support. Network uses
+  <a href="https://developer.mozilla.org/en-US/docs/Web/HTML/Canvas">HTML canvas</a>
+  for rendering.
 </p>
 
 <p>

docs/timeline.html

@@ -23,7 +23,10 @@
   The time scale on the axis is adjusted automatically, and supports scales ranging
   from milliseconds to years.
 </p>
-
+<p>
+  Timeline uses regular HTML DOM to render the timeline and items put on the
+  timeline. This allows for flexible customization using css styling.
+</p>
 
 <h2 id="Contents">Contents</h2>
 <ul>