+=item B<uml>
+
+This is a User-Mode Linux (UML) guest.
+
+Status: contributed by Laurent Léonard
+
+=item B<virtage>
+
+This is Hitachi Virtualization Manager (HVM) Virtage logical partitioning.
+
+Status: data supplied by Bhavna Sarathy, not confirmed
+
+=item B<virtualbox>
+
+This is a VirtualBox guest.
+
+Status: contributed by Laurent Léonard
+