=over =item $OSNAME =item $^O X<$^O> X<$OSNAME> The name of the operating system under which this copy of Perl was built, as determined during the configuration process. For examples see L. The value is identical to C<$Config{'osname'}>. See also L and the B<-V> command-line switch documented in L. In Windows platforms, C<$^O> is not very helpful: since it is always C, it doesn't tell the difference between 95/98/ME/NT/2000/XP/CE/.NET. Use C or Win32::GetOSVersion() (see L and L) to distinguish between the variants. This variable was added in Perl 5.003. =back