(Probably from ad-agency tradetalk, "house freak") A hacker occupying a technical-specialist, R&D, or systems position at a commercial shop. A really effective house wizard can have influence out of all proportion to his/her ostensible rank and still not have to wear a suit. Used especially of Unix wizards. The term "house guru" is equivalent.
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Nearby terms: Hot Swappable Routing Protocol « hot swapping « HOTT « house wizard » Houston Automatic Spooling Program » Howe, Denis » how many nibbles in a byte