RetroGaming

After the rotary phones who used "ticks" to spell out numbers (you could hang up quickly to spell phone numbers, like click-click-click meant "2") the newer used sound burst, or short beeps. Beep, boop, baap meant like 735. You could buy a little beeper that dialed a phone number for you. History goes people could mimic the beeps to dial a number, like taking up a phone and go beoueoeop and call comeone.

Phreaking (van eck) is when you listen in on radio waves from electronic equipment, as cool as it is, it has nothing to do with this little information nugget :-)