Perl Virtualab Protocols (Chang Bioscience) Perl is widely used in bioinformatics because it can easily manupilate texts and files. It is also an easy language to learn. 1. A good book for beginner is Learning Perl(O'Reilly). 2. To download Perl, go to Perl.org. 3. To download Perl modules, go to CPAN. 4. For applications of Perl in biology, go to BioPerl.org.