Is this what you mean?

http://tmrc.mit.edu/hackers-ref.html

Wow, I had no idea it went this far back. I've always been curious about etymology. After seeing this whole thread, I dug up these references:

http://www.cs.berkeley.edu/~bh/hacker.html

http://www.techrepublic.com/blog/security/hackers-and-cracke...