Group tech houses have proliferated across the San Francisco Bay Area in the artificial intelligence boom. One of the most prominent has also racked up an extensive police record.

© Minh Connors for The New York Times

The Times columnist Kevin Roose sees reasons for optimism — and worry — as the world wakes up to what Silicon Valley has been talking about for years.

© Matt Chinworth

Data science helps determine who receives betting incentives, but the company has resisted using similar technology to protect gamblers at risk of addiction.

© Hokyoung Kim

Karandeep Anand, an expert in building artificial intelligence and consumer technology products, will become Disney’s first chief technology officer.

© Manaure Quintero/Agence France-Presse — Getty Images