Boolean Logic

The 16 Boolean logic functions (Click for bigger image)
Knuth's latest pre-fascicle, Boolean Basics, is up. It's hardcore, and I didn't read it, but the intro has a neat list of the 16 possible logical operations and their synonyms. (Knuth is nothing if not thorough.)
(Via Knuth News. A PDF version of the file can be found here: fasc0b.pdf)