= H =
1. Short for hexadecimal, base 16. 2. A 6-pack
of anything (compare quad, sense 2). Neither usage has
anything to do with magic or black art, though the pun is
appreciated and occasionally used by hackers. True story: As a
joke, some hackers once offered some surplus ICs for sale to be
worn as protective amulets against hostile magic. The chips were,
of course, hex inverters.
--The Jargon File version 4.3.1, ed. ESR, autonoded by rescdsk.