OpenAI chief executive Sam Altman responded to Elon Musk’s offer to buy the AI startup this week by saying it’s not for sale.

The Uber logo is displayed on a car on March 22, 2019 in San Francisco, California. - Image: Justin Sullivan / Staff () Uber ...

Waymo started offering self-driving rides through its Waymo One app and is now expanding to Uber. Dara Khosrowshahi suggests ...