False claims and risky trades at the Silicon Valley start-up HeadSpin were part of a pattern of trouble emerging at young companies that lacked controls.
After more than eight months of research and development, Google has unveiled its most powerful A.I. so far. But only parts of it are widely available.
Police departments have issued warnings about a new Apple setting that lets users exchange contact information by bringing their devices together. Tech experts say the fears are overblown.