Simple tone generator script that will play the 2600Hz blue box tone on an HP39G graphical calculator.
9bf3a037ffe01de3ed4f73753a1bff4dbfae8e03a78eba1a52e03d25492d6eeb
Article describing faults in the Coinvox Euro payphone used in the Netherlands. By default, the phones are shipped with a standard configuration which allows for free phone calls and other possibilities.
d05bbe8076a6574646ddef3c09b8a141cde6c8d6e9285b35e02f1e3e9f22348a