A term of art is a word when used in a professional context has a very precise meaning. I’ve been reading a lot about game mechanics and theory, inspired by Amy Jo Kim’s terrific talk given recently at Linkedin. Right now I’m half-way through A Theory of Fun by Raph Kosterner. It’s an odd, rambling book, and most it is familiar to anyone who’s been doing interaction design for awhile. But I do notice that game designers talk about emotion much more than we do, and they are crafting new terms of art and taxonomies that could be useful to anyone doing interactive (and particularly social) design.