The most useless language you know?

Sup prog. I was just curious as to what is the most obsolete or useless programming language you know.

I myself learned Atari BASIC in high school, and regret my time wasted to this day. I have yet to come across something BASIC does that can't be done better, faster or more efficiently in C, Perl, etc. BASIC's only impact on the world of programming as far as I'm concerned is that it taught kids to write sloppy code way before Java did.

Anyone else have a similar experience?

Prolog is awesome. Most people hate it because it's so much unlike all other forms of programming. Another thing is that solutions in Prolog are usually very concise. You actually spend a lot more time thinking than LOL TYPING CODE AWAY.

My only problem with it is that after a while, things tend to either work or break randomly without anyone really understanding how.