A friend of mine asked me for help with a little bit of Perl to format some output, in a HP-UX, dating from who-knows-when.
To my surprise, common things didn't work! A BEGIN block, for instance!
I thought: "Well, maybe it's an old version of Perl... let's try the -v switch"
$RCSfile: perl.c,v $$Revision: 4.0.1.8 $$Date: 1993/02/05 19:39:30 $
Wow...
I did what I wanted to by other means, going around BEGIN, chomp and others...
Nevertheless, and even though it only lasted for a couple of minutes, it was interesting :-) It's not everyday that I get to look way back into the past ;-)