Don't think it ends there, though; in hacking (as in many other fields) it takes about ten years to achieve mastery. And if you are a real hacker, you will spend the rest of your ...
http://catb.org/~esr/faqs/hacker-howto.html

HackThisSite! is a legal and safe network security resource where users test their hacking skills on various challenges and learn about hacking and network security. Also ...
http://www.hackthissite.org/

Hacking may refer to: Computer hacking, including the following types of activity: Hacker (programmer subculture), activity within the computer programmer subculture
http://en.wikipedia.org/wiki/Hacking

Hacker, cyborg sidekick character in The Centurions Other. Hacker Brewery, since 1972 merged into Hacker-Pschorr Brewery, and its beer See also. Hacking
http://en.wikipedia.org/wiki/Hacker

The year is 1988, where a Russian engineer [Vladimir Demin] has combined a Bayan, or button accordion, with several (we lost count at about 96) solenoids.
http://hackaday.com/