今天无聊的时候Google了这两个词。。。

Definitions of Geek on the Web

A person who may be very smart yet lacks the social graces of those who are considered cool , a “computer geek” is someone who spends too much time on the computer and has no social life.
www.planetpals.com/coolkidz.html

A person more comfortable with computers than with other persons.
stott.feis.herts.ac.uk/support/technical_glossary.htm

Definitions of Nerd on the Web

Someone so unfortunate as to believe that all conversations might productively revolve around computing and IT issues. Interestingly, only a nerd might know that the word derives from the 1950 Dr. Seuss book ‘If I Ran the Zoo’ from which: “And then, just to show them, I’ll sail to Ka-Troo – And Bring Back an It-Kutch, a Preep and a Proo – A Nerkle, a Nerd, and a Seersucker, too!” See Geek.
www.pads.ahds.ac.uk:81/glossary2.html

A nerd is very similar to a geek, but with more RAM and a faster modem. Nerds often find geeks dull because geeks don’t spend enough time talking about computers.
www.scotsmist.co.uk/glossary_n.html

意思是,nerd是比较贫的geek。。。:D