Yes that's Perl not PERL. The community is very adamant about this, so if the tutorial says PERL you know that it is written by someone outside the Perl community. The current Perl version is 5.32, ...

This lets you test your code against multiple Perl versions without interfering with, or being influenced by, any other version. This includes your operating system’s default Perl package, which is ...

The Apple Developer Connection’s (ADC) Internet Developer site has published a new article with step-by-step instructions for installing Perl 5.8 on Mac OS X 10.2 (Jaguar). The article also walks ...