There is some difference, but very little. They all refer to someone who is socially awkward and an introvert. The picture Hollywood gives is someone with glasses, out-of-style clothes and a pocket protector for his pens. One difference is that nerd and geek give a picture of someone who is good in school (but still awkward). A dork might not carry any image of being good in school.

thx guys

Fun question. Than you. Nerd= respected intellect. (these days) May be rich or rich soon Geek= respected intellect. (Important factor - Has hobbies that are not appealing to girls). May be rich or rich soon Dork= not respected for intellect (regardless of merits) Probably not on a path to wealthy from own abilities.