where else to look for a method if you can't find it in the current
package. This is how Perl implements inheritance. Each element of the
@ISA array is just the name of another package that happens to be a
-class package. The classes are searched (depth first) for missing
-methods in the order that they occur in @ISA. The classes accessible
+class package. The classes are searched for missing methods in
+depth-first, left-to-right order by default (see L<mro> for alternative
+search order and other in-depth information). The classes accessible
through @ISA are known as base classes of the current class.
All classes implicitly inherit from class C<UNIVERSAL> as their