+=item B<docker>
+
+This is a Docker container.
+
+Status: confirmed by Charles Nguyen
+
+=item B<hyperv>
+
+This is Microsoft Hyper-V hypervisor.
+
+Status: confirmed by RWMJ
+
+=item B<ibm_systemz>
+
+This is an IBM SystemZ (or other S/390) hardware partitioning system.
+Additional facts listed below may also be printed.
+
+=item B<ibm_systemz-direct>
+
+This is Linux running directly on a IBM SystemZ hardware partitioning
+system.
+
+This is expected to be a highly unusual configuration - if
+you see this result you should treat it with suspicion.
+
+Status: not confirmed
+
+=item B<ibm_systemz-lpar>
+
+This is Linux running directly on an LPAR on an IBM SystemZ
+hardware partitioning system.
+
+Status: not confirmed
+
+=item B<ibm_systemz-zvm>
+
+This is a z/VM guest running in an LPAR on an IBM SystemZ
+hardware partitioning system.
+
+Status: confirmed by RWMJ using a Fedora guest running in z/VM
+
+=item B<linux_vserver>
+
+This is printed for backwards compatibility with older virt-what which
+could not distinguish between a Linux VServer container guest and
+host.
+
+=item B<linux_vserver-guest>
+
+This process is running in a Linux VServer container.
+
+Status: contributed by Barış Metin
+
+=item B<linux_vserver-host>
+
+This process is running as the Linux VServer host (VxID 0).
+
+Status: contributed by Barış Metin and Elan Ruusamäe
+
+=item B<lxc>
+
+This process is running in a Linux LXC container.
+
+Status: contributed by Marc Fournier
+
+=item B<kvm>
+
+This guest is running on the KVM hypervisor using hardware
+acceleration.
+
+Note that if the hypervisor is using software acceleration
+you should I<not> see this, but should see the C<qemu> fact
+instead.
+
+Status: confirmed by RWMJ.
+