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A 'blue box' routed calls through the network. https://en.wikipedia.org/wiki/Blue_box A red box simulated the tones made when coins were inserted into a pay phone. https://en.wikipedia.org/wiki/Red_box_(phreaking)

shrug

Everyone still called it blue boxing when you were putting tones into the phone

And people called HTML a programming language. Doesn’t make it correct.

And people call cracking hacking and hacking cracking. How deep should we go?

and phreaking - hacking