hex n.
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.
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