Bobby Allyn

President Trump has a new rallying cry in his escalating crusade against Twitter. As he put it in a tweet Friday: "REVOKE 230!"

Updated at 9 p.m. ET

President Trump signed an executive order Thursday aimed at limiting the broad legal protections enjoyed by social media companies, two days after he tore into Twitter for fact-checking two of his tweets.

Updated at 7:55 p.m. ET

Nearly half of the Twitter accounts spreading messages on the social media platform about the coronavirus pandemic are likely bots, researchers at Carnegie Mellon University said Wednesday.

Researchers culled through more than 200 million tweets discussing the virus since January and found that about 45% were sent by accounts that behave more like computerized robots than humans.

There are a lot of people trying to reach celebrity entrepreneur Elon Musk. Sometimes, though, they get Lyndsay Tucker, a 25-year-old skin care consultant.

Tucker, who works at a Sephora beauty store in San Jose, Calif., had never heard of the Tesla and SpaceX founder and CEO until a couple years ago, when she began fielding a steady stream of calls and text messages intended for him.

Apple Stores are beginning to reopen after the company in mid-March closed hundreds of its locations in response to the coronavirus pandemic.

Nearly 100 stores, or about a fifth of the tech giant's worldwide storefronts, are now open, including locations in Alabama, Florida, California and Washington state.

About 25 additional stores in the U.S. in seven states are set to open their doors this week, according to Apple.

With its ride-hailing business devastated by the coronavirus pandemic, Uber is in talks to acquire online food delivery company Grubhub.

If the two sides can reach a deal, the combined company would emerge as the dominant food-delivery app with 55% of the U.S. market, according to analyst Dan Ives with Wedbush Securities.

After two weeks of working from her Brooklyn apartment, a 25-year-old e-commerce worker received a staffwide email from her company: Employees were to install software called Hubstaff immediately on their personal computers so it could track their mouse movements and keyboard strokes, and record the webpages they visited.

They also had to download an app called TSheets to their phones to keep tabs on their whereabouts during work hours.

Twitter is now labeling misleading, disputed or unverified tweets about the coronavirus. It is even removing content it believes could lead to harm, the company announced Monday.

The labels warn users about the problematic tweets and steer them to authoritative sources, including public health agencies and credible news outlets.

Yoel Roth, Twitter's head of site integrity, said on a call with reporters that the mission is not to "fact-check the entire Internet," but rather to limit the spread of potentially harmful tweets.

Business was humming for Airbnb host Josep Navas Masip in Philadelphia. So he purchased a second home and planned to renovate it and add it to his Airbnb offerings.

"In the middle of the renovation, the coronavirus crisis hit," he said. "I had to cancel my renovations, and I had to tell the contractor to stop working."

Navas Masip, 44, was bringing in about $2,000 a month from the two rooms he was renting from his South Philadelphia home.

Updated Thursday at 6:51 p.m. ET

Zoom has agreed to do more to prevent hackers from disrupting video conferencing sessions and to protect users' data, according to a deal announced on Thursday by New York Attorney General Letitia James.

Airbnb says it's cutting 1,900 employees — about 25% of its workforce — in one of the largest layoffs to hit Silicon Valley as a result of the coronavirus outbreak.

The global pandemic is the "most harrowing crisis of our lifetime," Airbnb CEO and co-founder Brian Chesky said in an email to employees on Tuesday. The virus's devastating blow to the travel industry means the company's 2020 revenue is forecast to be less than half of what the startup pulled in last year, he said.

Dan Munro changed his Twitter handle to "Dan is interviewing" after finding out he lost his job via a Zoom call.

The method of firing is becoming the norm in the tech industry during the coronavirus recession.

"No one enjoyed it," Munro said. "It was pretty rough for everyone because we're a pretty small company and everybody knows each other pretty well."

The CEO of Airbnb has made a lot of chocolate-chip cookies since the coronavirus pandemic began.

"People call it stress-baking," Brian Chesky said. "If that's the case, I'm going to be a Michelin chef pretty soon, because I got enough stress to do a lot of baking."

That's no surprise given that the lure of Airbnb — to have a unique experience by staying in a stranger's home — has lost considerable appeal as the pandemic courses its way through the world, paralyzing travel.