ActivePerl is ActiveState's quality-assured, ready-to-install distribution of Perl, available for AIX, HP-UX, Linux, Mac OS X, Solaris, and Windows. The standard ActivePerl distribution is available for free download. ActivePerlis property of Perl Development Team.
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Perl, A powerful interpreted language, which is particularly good for text-processing. Also often used for Web CGI scripts. Famous for being 'powerful but cryptic'. Python is very similar but less cryptic.