Yes. Details under "Publication History": https://en.m.wikipedia.org/wiki/2600:_The_Hacker_Quarterly https://en.m.wikipedia.org/wiki/2600:_The_Hacker_Quarterly

Yes. Details under "Publication History": https://en.m.wikipedia.org/wiki/2600:_The_Hacker_Quarterly https://en.m.wikipedia.org/wiki/2600:_The_Hacker_Quarterly And "Blue Boxes" exploited the 2600Hz signal to make free phone calls, explained here under "Operation": https://en.m.wikipedia.org/wiki/Blue_box https://en.m.wikipedia.org/wiki/Blue_box Steve Wozniak built Blue Boxes and Steve Jobs sold them: https://artsandculture.google.com/asset/blue-box-designed-and-built-by-steve-wozniak-and-marketed-by-steve-jobs-circa-1972-wozniak-steve-1950/OQGxyXq2DFvKaw?hl=en https://artsandculture.google.com/asset/blue-box-designed-an...