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]