This is Perl module Loop::Sustainable. INSTALLATION Loop::Sustainable installation is straightforward. If your CPAN shell is set up, you should just be able to do % cpan Loop::Sustainable Download it, unpack it, then build it as per the usual: % perl Makefile.PL % make && make test Then install it: % make install DOCUMENTATION Loop::Sustainable documentation is available as in POD. So you can do: % perldoc Loop::Sustainable to read the documentation online with your favorite pager. Toru Yamaguchi