~/dev/MyModule/Makefile.PL
~/dev/MyModule/lib/Local/Math/EM.pm    # Local::Math::EM
~/dev/MyModule/lib/Local/Math/Levy.pm  # Local::Math::Levy
~/dev/MyModule/lib/Local/Math/Log2.pm  # Local::Math::Log2
~/dev/MyModule/bin/script.pl
~/dev/MyModule/t/*.t                   # (optional but recommended)