While I realize that this is a 'quick reference', you can get a lot more -- and also quick info -- by typing 'perldoc perlvar' at the command line. For example, while $^V does indeed hold the perl version, to get the string representation of it, you need to use sprintf('%vd, $^V);. So yes, this is useful, but perlvar really isn't that difficult to pull up and it holds a little more info.