So over the last couple of days I've been poking around the Sam Brown drawings from 2000. His fanbase must have included an awful lot of computer geeks then. I'm not finished looking through them, but I've found three already that take an insider's view to fully appreciate.

 "It's not a bug - it's a feature."

I write computer programs all day

The backreference \n, where n is a single digit, matches the substring previously matched by the nth parenthesized subexpression of the regular expression.