I printed quite a few of those t shirts myself, so I’m quite biased in that. [laughs] Many of them are still worn by people in the Perl community. There’s one that says…It’s Perl 6 was the project we’re working on, nowadays it’s called Raku. You can still find a T shirt that says “Polymorphic Existential Recursive Lambda 6,” so Perl 6. There’s a mock cap that goes with it that says, “Powered by Ph.D.” rather than “Powered by PHP.”