Related:

• wizard: n. 1. A person who knows how a complex piece of software or hardware works (that is, who {grok}s it)
  esp. someone who can find and fix bugs quickly in an emergency....
• wizard n. 1. Transitively, a person who knows how a complex piece of software or hardware works (that is, who groks it)
  esp. someone who can find and fix bugs quickly in an emergency....
• whacker: [University of Maryland: from {hacker}] n.
  1. A person, similar to a {hacker}, who enjoys exploring the details of programmable systems and how to stretch their capabilities....
• wirehead: /wi:r'hed/ n. [prob. from SF slang for an electrical-brain-stimulation addict] 1.
  A hardware hacker, especially one who concentrates on communications hardware....
• lord high fixer: [primarily British, from Gilbert & Sullivan's `lord high executioner'] n.
  The person in an organization who knows the most about some aspect of a system....
• UNIX weenie: [ITS] n. 1. A derogatory play on `UNIX wizard', common among hackers who use UNIX by necessity but would prefer alternatives.
  The implication is that although the person in question may consider mastery of UNIX arcana to be a wizardly skill, the only real skill involved is the ability to tolerate (and the bad taste to wallow in) the incoherence and needless complexity that is alleged to infest many UNIX programs....
• hacker n. [originally, someone who makes furniture with an axe] 1.
  A person who enjoys exploring the details of programmable systems and how to stretch their capabilities, as opposed to most users, who prefer to learn only the minimum necessary....
• Unix weenie n. [ITS] 1. A derogatory play on `Unix wizard', common among hackers who use Unix by necessity but would prefer alternatives.
  The implication is that although the person in question may consider mastery of Unix arcana to be a wizardly skill, the only real skill involved is the ability to tolerate (and the bad taste to wallow in) the incoherence and needless complexity that is alleged to infest many Unix programs....
• mudhead: n. Commonly used to refer to a {MUD} player who eats, sleeps, and breathes MUD.
  Mudheads have been known to fail their degrees, drop out, etc....