He is the author of multiple Perl modules on CPAN and maintains the perlfaq portions of the core Perl documentation.

[3][4] In 2014 he revitalized the PerlPowerTools AKA PPT project.

[5] In February 1999, Tom Christiansen announced the PerlPowerTools project to provide a unified BSD toolbox, i.e. a reimplementation of the classic Unix command set in pure Perl.

Perl is the same (mostly) everywhere you go and the same programs could run the same everywhere instead of being reimplemented for each platform.

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