In Steven Levy's classic, sprawling, rapturous ode to the birth of the hacker movement, the book Hackers, Captain Crunch is a bit player--a hacker who took his name from the toy whistle available free in boxes of Captain Crunch When blown into a pay phone, this whistle could be used to make free long distance calls.
Full story:
http://www.technologyreview.com/blog/mimssbits/26111/