When an eight-year-old whistled into the phone in the second half of the 1950s, the other end suddenly fell silent. The recorded message to which Joe Engressia had been listening stopped.
Ever the tinkerer, Engressia called — and whistled — again, establishing with perfect pitch 2600 Hz as the frequency that would halt playback.
So, Joe Engressia (who would later take on the name Joybubbles), quite by accident, became a kind of phone freak — or "phreak." "Phishing," of course, is a term coined in remembrance and likeness for social engineering that attempts to collect passwords, for instance, or credit card numbers. In Outlook.com, you can sound the alert whistle metaphorically when you spot such an attempt in an email:
›› Somebody's trying to trick you into giving away your personal information? Here's how to report such phishing emails in and to Outlook.com or Windows Live Hotmail.