Alexa, Understand Me

On August 31, 2012, four Amazon engineers filed the fundamental patent for what ultimately became Alexa, an artificial--intelligence system designed to engage with one of the world's biggest and most tangled data sets: human speech. The engineers needed just 11 words and a simple diagram to describe how it would work. A male user in a quiet room says: "Please play'Let It Be,' by the Beatles." A small tabletop machine replies: "No problem, John," and begins playing the requested song. From that modest start, voice-based AI for the home has become a big business for Amazon and, increasingly, a strategic battleground with its technology rivals. Google, Apple, Samsung, and Microsoft are each putting thousands of researchers and business specialists to work trying to create irresistible versions of easy-to-use devices that we can talk with. "Until now, all of us have bent to accommodate tech, in terms of typing, tapping, or swiping.