Technology from Silicon Valley and Beyond - Silicon Valley Historical Association

Blue Box

This photo is of a blue box (similar to the one that Steve Jobs and Steve Wozniak used). A blue box is an electronic device that generates the in-band signaling audio tones formerly used to control long-distance telephone exchanges.

BlueboxSteve JobsSteve WozniakJobsWozniaktelephonytelephoneelectronic devicebandsignaling