Geek taxonomy from a great article about subcultures in Akihabara

“Self-confessed ‘super otaku’ Tetsuto Fujiyama says, ‘There are five different kinds of geeks in Akihabara. The oldest denizens are the electric appliance geeks, who come to purchase electronic parts and other equipment. Next are the PC geeks, who like to build their own original computers that run as fast as possible. Third are TV animation geeks whose brains can’t distinguish between reality and the animation. The fourth group are the magazine geeks who have made original animation fantasy stories influenced from TV and game animation and publish them in small magazines circulated among themselves. The last group are those geeks who love to play video games in which erotic animation is used.'”