Behaivior

Mark Lennihan / AP Photo

Wearable technology like Fitbits and Apple Watches can measure physiological signals and track a user’s location.

Kenny Chen / Ascender

Seven Pittsburgh-based startups are still in the running for the IBM Watson  IBM Watson AI XPRIZE. That's more entries than any other U.S. city in the global challenge to use artificial intelligence to tackle some of the world's toughest problems.