Answer Posted / rameshravi

A package is a division of the global namespace; that means
you can have a global variable $foo and/or a sub named foo
in one package and a different global variable $foo and
different sub named foo in a different package.

A "module" is a file named according to the package it
contains, so module Foo::Bar would be in a file named
Foo/Bar.pm. There's no need for packages to be modules or
for a module to contain only that one package.

The term "module distribution" refers to a collection of one
or more modules that get built/installed together. Sometimes
the "distribution" part is left off and it's just called
"module", but it's really a different idea than a single module.

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