The digital version of the SIM card, included on many newer phones, is set to become prevalent. It also offers affordable cellular data abroad. More

Founded by ex-Google employees, the Silicon Valley company is among the few start-ups poised to compete with OpenAI, the creator of ChatGPT. More

After criticizing A.I. companies for liberal bias, programmers started envisioning right-wing alternatives, making chatbots a new front in the culture wars. More

This month, the company announced a new 60-minute “daily screen time limit” for users under 18. But for most young users, staying on the app takes just a few taps. More

Federal labor regulators said that Amazon had illegally barred off-duty employees from work sites and that the policy was aimed at union backers. More

Shares of the financial tech company plunged after Hindenburg Research said it had failed to stamp out illegal activity on its platforms, including drug sales and sex trafficking. More

If the White House can’t force a sale, that would effectively leave it with two options to resolve concerns about the company. More

China’s commerce ministry publicly rebuked the Biden administration’s efforts to push TikTok’s Chinese ownership to sell the app or face a possible ban in the United States. More

Shou Zi Chew is testifying for More

The Chinese-owned video app has become a battleground as the U.S. and China duel for tech leadership. More

Relativity Space, a private company with ambitions for sending people to Mars, made it off the launchpad, but the vehicle experienced problems during the second stage of its flight. More

The agency charged Justin Sun with violations of securities law in a scheme involving the actress Lindsay Lohan and other celebrities. More

One of the first people to receive a graduate degree in the field, Dr. Wulf helped to adapt an early Pentagon communications web into the network that eventually grew into the internet. More

Artificial intelligence can make adults nervous, but experts say exploring it as a family is the best way to understand its pros and cons. More

In the 1970s, Bob Metcalfe helped develop the primary technology that lets you send email or connect with a printer over an office network. More