<TABLE>
<TR>
<TD><img src="picts/MadHatter.gif" alt="ALICE Off-line Project Logo">
-<TD><img src="picts/alidesc_name.gif" alt="AliRoot description">
+<TD><img src="picts/manual_name.gif" alt="AliRoot description">
<TD><img src="picts/AliceLogo.gif" alt="ALICE Logo">
</TR>
</TABLE>
<h2>Overview of AliRoot</h2>
-<p> Under construction
+<font size=+2 color=red><blink>This part is under construction.</blink>
+</font>
+
+<h3>General AliRoot architecture</h3>
+
+<p> This picure is a general schema of the AliRoot architecture.
+
+<center><img src="picts/architecture.gif" height=500></center>
+
+<p> The following picture shows an high-level decomposition of AliRoot
+into functional blocks.
+
+<center><img src="picts/aliroot_schema.gif" height=400></center>
+
+<h3>Virtual MonteCarlo schema</h3>
+
+<p> This picture illustrates the concept of Virtual MonteCarlo schema
+as it is implemented by AliRoot.
+
+<center><img src="picts/virtualmc.gif" height=500></center>
+
+<p> This picture illustrates the stepping action mechanism for the virtual
+MC. Only the GEANT 3 version is operational, while the GEANT 4
+one is under testing.
+
+<center><img src="picts/virtualmc2.gif" height=300></center>
+
+<h3>AliRoot flow of control</h3>
+
+<p> This picture illustrates the AliRoot flow of control.
+
+<center><img src="picts/alirootflow.gif" height=300></center>
<hr>
<address>