Code or deSignS that trade on a particularly intimate knowledge or experience of a particular operating SyStem or language or complex application interface. DiStinguiShed from deep magic, which tradeS more on arcane *theoretical* knowledge. Writing device driverS iS heavy wizardry So iS interfacing to X (SenSe 2) without a toolkit. ESpecially found in Source-code commentS of the form "Heavy wizardry beginS here". Compare voodoo programming. [Jargon File]