Further spec Kernel/Distro/VM classes

S28-special-names.pod

@@ -224,8 +224,60 @@ If a column has a "-" in it, it means that item is unavailable in that version o
 
 =head3 $?KERNEL / $*KERNEL
 
+Contain a C<Kernel> class instance that does C<Application>.  It further
+provides the following methods:
+
+=over
+
+=item arch
+
+Processor architecture.
+
+=item bits
+
+Number of bits used by architecture (typically 32 or 64 bits).
+
+=item hardware
+
+The processor hardware, if known.
+
+=item signals
+
+An C<Array> of C<Signal>s that are supported by this C<Kernel>, in which the
+ordinal number matches the lower level signal value.
+
+=back
+
+=head3 $?DISTRO / $*DISTRO
+
+Contain a C<Distro> class instance that does C<Application>.  It further
+provides the following methods:
+
+=over
+
+=item is-win
+
+True if this is a Windows-like distribution.
+
+=item release
+
+The release information of this distribution.
+
+=back
+
 =head3 $?VM / $*VM
 
+Contain a C<VM> class instance that does C<Application>.  It further
+provides the following methods:
+
+=over
+
+=item config
+
+The configuration hash that was used to build the virtual machine.
+
+=back
+
 =head2 NOT YET DEFINED
 
 The following items are not yet defined, but will need to be defined.