Lore has it that in the golden days of IBM, Casual Friday meant you could work with your suit jacket unbuttoned. While we're calling out our favorites, I'll no

Lore has it that in the golden days of IBM, Casual Friday meant you could work with your suit jacket unbuttoned. While we're calling out our favorites, I'll nominate Prolog. I know nothing about Prolog but that entry makes me laugh every time. "His goal is to create a language with the intelligence of a two year old. He proves he has reached his goal by showing a Prolog session that says "No." to every query."