is identical to C<$Config{'osname'}>. See also L<Config> and the
B<-V> command-line switch documented in L<perlrun>.
+In Windows platforms, $^O is not very helpful: since it is always
+C<MSWin32>, it doesn't tell the difference between 95/98/ME/NT/2000/XP/CE.
+Use Win32::GetOSVersion() (see L<perlport>) and other means (like for
+example the presence/absence of some files) to distinguish between
+the variants.
+
=item ${^OPEN}
An internal variable used by PerlIO. A string in two parts, separated