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+
+  <p>This section covers the following topics:</p>
+
+  <ul>
+    <li>
+      <p><a href="whatis.html#overview">Overview</a></p>
+    </li>
+
+    <li>
+      <p><a href="whatis.html#features">Features of the LTPDA Toolbox</a></p>
+    </li>
+
+    <li>
+      <p><a href="whatis.html#background">Expected Background for Users</a></p>
+    </li>
+
+  </ul><a name="overview" id="overview"></a>
+
+  <h3 class="title">Overview</h3><a class="indexterm" name=
+  "zmw57dd0e178" id="zmw57dd0e178"></a>
+
+  <p>The LTPDA Toolbox is a MATLAB<sup>&#174;</sup> Toolbox designed 
+    for the analysis of data from the LISA Technology Package (part 
+    of the LISA Pathfinder Mission). However, the toolbox can be used for
+    any general purpose signal processing, and is particularly useful for
+    analysis of typical lab-based experiments.
+  </p>
+  <p>
+    The Toolbox implements accountable
+	and reproducible data analysis within MATLAB<sup>&#174;</sup>.</p>
+
+  <p>With the LTPDA Toolbox you operate with LTPDA Objects. An 
+	LTPDA Object captures more than just the data from a particular
+	analysis: it also captures the full processing history that led
+	to this particular result, as well as full details of by whom and 
+	where the analysis was performed.</p>
+
+	<a name="features" id="features"></a>
+
+  <h3 class="title">Features of the LTPDA Toolbox</h3>
+
+  <p>The LTPDA Toolbox<a class="indexterm" name="zmw57dd0e204" id=
+  "zmw57dd0e204"></a> has the following features:</p>
+
+  <ul type="disc">
+    <li>
+      	<p> Create and process multiple LTPDA Objects. </p>
+	</li>
+    <li>
+      	<p> Save and load objects from XML files. </p>
+	</li>
+	<li>
+		<p> Plot/view the history of the processing in any particular object.</p>
+	</li>
+	<li>
+		<p> Submit and retrieve objects to/from an LTPDA Repository.</p>
+    </li>
+	<li>
+		<p> Powerful and easy to use Signal Processing capabilities.</p>
+    </li>
+  </ul>
+
+  <div style="margin-left: 2em">
+    <a name="zmw57dd0e257" id="zmw57dd0e257"></a>
+
+    <table cellspacing="0" class="note" summary="Note" cellpadding=
+    "5" border="1">
+      <tr width="90%">
+        <td>
+          <p><b>Note</b>&nbsp;&nbsp; LTPDA Repositories are external to 
+	MATLAB and need to be set up independently. </p>
+        </td>
+      </tr>
+    </table>
+  </div><a name="background" id="background"></a>
+
+  <h3 class="title">Expected Background for Users</h3>
+
+  <h4 class="title">MATLAB</h4>
+
+  <p>This documentation assumes you have a basic working
+  	understanding of MATLAB. You need to know basic MATLAB syntax 
+	for writing your own m-files.
+	</p><a name="f3-20804" id="f3-20804"></a>