[Cool] list of classes that inherit from Cool

lib/Cool.pod

@@ -15,7 +15,15 @@ C<Int> converts the integer to C<Str> first.
 
     123.substr(1, 1);   # '2', same as 123.Str.substr(1, 1)
 
-The following table summarizes the methods and what type they coerce to
+The following built-in types inherit from C<Cool>:
+L<Array> L<Backtrace> L<Bag> L<Baggy> L<Bool> L<Complex> L<Cool>
+L<Duration> L<Enumeration> L<EnumMap> L<FatRat> L<Hash> L<Instant>
+L<Int> L<Iterable> L<Iterator> L<KeyHash> L<KeySet> L<List>
+L<ListIter> L<LoL> L<MapIter> L<Nil> L<Num> L<Numeric> L<Parcel>
+L<Range> L<Real> L<Seq> L<Set> L<Stash> L<Str> L<Stringy>
+
+The following table summarizes the methods that C<Cool> provides, and
+what type they coerce to
 
 =begin table