Someone well-versed in a science, especially insofar as computers are concerned. Many have long hair, sleek typing fingers, and slender builds from not getting much exercise. Also frequently interested in RPGs, cyberpunk culture, and obscure programming languages.
Computer geeks are so sexy! Their braininess, their long hair, their cute glasses, their ability to code for hours on end, their geekspeak, their innate sweet shyness, their *ahem* attentiveness... the list goes on... *sigh* Computer geeks - gotta love 'em!