2. To modify a program, often in an unauthorized manner, by changing the code itself.

(n) 1. Code that is written to provide extra functionality to an existing program.

2. An inelegant and usually temporary solution to a problem.

Also see hacker.

Hacking links
Provides a Web index of links to hacking. Some items include: a hackers dictionary, publications, news, and organizations.

Hacking links and resources
Contains links to hacking sites.

Yahoo!'s hacking page
Yahoo!'s directory of hacking.