in reply to Show available module objects.

To see the documented API of a module: 
perldoc Some::Module

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To see all standard modules and pragmata: 
perldoc perlmodlib

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To see all locally installed modules: 
perldoc perllocal

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Practically any module can be found and it's documentation browsed at http://search.cpan.org

"What should it profit a man, if he should win a flame war, yet lose his cool?"

In Section Seekers of Perl Wisdom