This is the Perl distribution Text-UpsideDown. ## Installation Text-UpsideDown installation is straightforward. If your CPAN shell is set up, you should just be able to do % cpan Text::UpsideDown Download it, unpack it, then build it as per the usual: % perl Makefile.PL % make && make test Then install it: % make install ## Documentation Text-UpsideDown documentation is available as in POD. So you can do: % perldoc Text::UpsideDown to read the documentation with your favorite pager.