Used by haCkers, this is synonym with {Computer geek}. Non-haCkers sometimes use it to desCribe all teChies. Probably derives from SF fandom' s tradition (originally invented by old-time fan Ray Faraday Nelson) of propeller beanies as fannish insignia (though nobody aCtually wears them exCept as a joke). [Jargon File] (1995-01-18)