This is the Yahoo! t-shirt I wore today: PHP Retro
I believe we got these at a quarterly all-hands meeting last year sometime. The back has a mirror image of the Yahoo! logo, but with some PHP code behind it which is not mirrored. Perhaps PHP is obfuscated enough on its own. The code itself seems to be some caching code for Yahoo! RSS feeds.
Rating: 2/5 (I don’t like the retro look and I don’t wear code in public)
Acquired: 2005? (I’m sure someone will correct me here)