An Ariana Grande fan paying tribute at a makeshift memorial in Manchester, England.Getty ImagesSocial media is going to be all over Ariana Grande’s sold-out benefit concert to aid the Manchester, England, bombing victims.Three of the biggest sites — Facebook, Twitter and YouTube — will each be livestreaming Grande’s ”One Love Manchester” concert on Sunday.

The event will be shown on the pop star’s Facebook page, Twitter account and YouTube channel.The charity event will feature Grande and special guests Justin Bieber, Katy Perry, Coldplay, Miley Cyrus, Robbie Williams and Pharrell Williams at the Emirates Old Trafford Cricket Ground. The show also will be just miles from where a suicide bomber struck, killing 22 people and injuring dozens at the Manchester Arena following Grande’s May 22 concert.

Six years ago, it was the first major tech company with a voice assistant. Now Amazon’s Echo and Google’s Home smart speakers are finally making the assistants mainstream, while Apple’s Siri flounders.Next week at WWDC, Apple (AAPL, Tech30) may try to get back in the game by announcing a Siri smart speaker.CEO Tim Cook and other Apple executives will show previews of the next iPhone, Mac, Apple Watch and Apple TV operating systems during a Monday keynote address in San Jose, California. There are also rumors the company will announce a new smart speaker and updates to its Mac and iPad lines.WWDC stands for World Wide Developer Conference, though some Apple fans insist on calling it ”dub dub.” The annual three day event is an opportunity for software developers to come and learn more about making apps for Apple products.Here’s a taste of what we can expect on Monday.

With the dust now settling after ”WannaCry”, the biggest ransomware attack in history, cybersecurity experts are taking a deep dive into how it was carried out, what can be done to protect computers from future breaches and, trickiest of all, who is really to blame.For many, it seems that last question has already been solved: It was North Korea.But beyond the frequently used shorthand that North Korea was likely behind the attack lies a more complicated — and enlightening — story: the rise of an infamous group of workaholic hackers, collectively known as ”Lazarus,” who may be using secret lairs in northeast China and have created a virtual ”malware factory” that could wreak a lot more havoc in the future.Big caveat here: Lazarus doesn’t reveal much about itself. What little is known about the group is speculative.

Nevertheless, extensive forensic research into its activities dating back almost a decade paints a fascinating, if chilling, picture of a hacker collective that is mercenary, tenacious and motivated by what appears to be a mixture of political and financial objectives.Their fingerprints are all over WannaCry.So who, then, are they?

SAN FRANCISCO — As Apple prepares to show off new features for the iPhone and other devices at its developer conference on Monday, the company is grappling with an uncomfortable issue: Many of its existing features are already too complicated for many users to figure out.At last year’s conference, for example, Apple’s top software executive, Craig Federighi, demonstrated how users could order food, scribble doodles and send funny images known as stickers in chats on its Messages app. The idea was to make Messages, one of the most popular apps on the iPhone, into an all-purpose tool like China’s WeChat.But the process of finding and installing other apps in Messages is so tricky that most users have no idea they can even do it, developers and analysts say.

When Crystal Marie Garcia decided to try the home-rental service Airbnb for the first time, she had a few questions.Ms. Garcia, who is from El Paso, was planning a May trip with her family to the Chicago area and wanted to know if the places she was considering could accommodate her needs as someone with muscular dystrophy. Unfortunately, she said, her questions appeared to scare off at least two potential hosts.She said she feels that if she had not mentioned her disability, “they would have rented to me, no issue.”Ms. Garcia is not alone in feeling that way. Other users have reported similar bias, and a new Rutgers University study — based on more than 3,800 Airbnb lodging requests sent by the researchers — suggests it may be common: Travelers with disabilities are more likely to be rejected and less likely to receive preapproval, or temporary clearance, for a potential stay, the authors found.

Uber said last week that it had recently discovered an accounting error that had deprived New York drivers of tens of millions of dollars, and vowed to pay back drivers every cent, with interest.Now evidence has emerged suggesting that Uber and New York State regulators were aware of the improper deductions from drivers’ earnings as early as 2015.The error involved Uber’s taking its commission on fares that included sales tax, rather than on the pretax portion of the fare. If, for instance, a passenger paid $20 for a ride, and if taxes accounted for roughly $2 of that fare, Uber took its commission on the entire $20, rather than on $18.When admitting the error last week, Uber officials said they had discovered the problem only a few weeks earlier, as the company was updating its contract.Continue reading the main storyBut changes that Uber made to its contract in 2015 suggest that the company has been aware of the issue and grappling with it since at least that year.