A hacker is, quite simply, someone who messes around with stuff…It doesn’t have to be a computer. It doesn’t even have to be technology. A hacker is someone who figures out how to get around barriers, won’t take no for an answer, asks an insane amount of questions and believes in sharing the information he or she discovers.

Emmanual Goldstein, editor and publisher of 2600 in 

http://www.amazon.com/Hack-This-Incredible-Hackerspace-Projects/dp/0789748975

(via notational)