http://www.perlmonks.org?node_id=996207


in reply to Re^2: Naming Convention For Global Variables?
in thread Naming Convention For Global Variables?

With the exception of $ARGV none of those variables are used by perl itself. They are specific to English.pm (see English) and are documented in perlvar for convenience (even though barely anybody uses English.pm).

perl -E'sub Monkey::do{say$_,for@_,do{($monkey=[caller(0)]->[3])=~s{::}{ }and$monkey}}"Monkey say"->Monkey::do'