John Draper (Captain Crunch)

John Draper, known as "Captain Crunch," is a legendary phone phreaker and computer pioneer recognized for his discovery that a toy whistle from a cereal box could generate the precise tone needed to manipulate AT&T's telephone switching systems. As a guest on late-night radio, his role as one of the founding figures of the hacking subculture and his influence on the early development of personal computing made him a fascinating voice from the origins of the digital age.