Concert promoters hoping to bring out legends such as Whitney Houston, Billie Holiday and Elvis Presley used to face an obvious problem -- the singers are dead.

But with rapid advances in technology, those stars and many more are returning to life through holograms, the three-dimensional light projections that have opened new frontiers for the live music and other industries.

Facebook chief executive and founder Mark Zuckerberg said Wednesday he believes India will be crucial to getting "the next billion online" and helping to alleviate poverty.

Speaking to about 900 students at New Delhi's Indian Institute of Technology, Zuckerberg said broadening Internet access was vital to economic development in a country where a billion people are still not online. 

Global online freedom declined for a fifth consecutive year as more governments stepped up electronic surveillance and clamped down on dissidents using blogs or social media, a survey showed Wednesday.

The annual report by non-government watchdog Freedom House said the setbacks were especially noticeable in the Middle East, reversing gains seen in the Arab Spring.

Twitter shares tumbled Tuesday after the struggling messaging platform reported only slim growth in its user base and a disappointing revenue outlook.

The San Francisco social network, which this month brought back co-founder Jack Dorsey as chief executive on a permanent basis, said its loss in the third quarter narrowed to $132 million from $175 million in the same period last year.

An Israeli NGO said Tuesday it was suing Facebook for failing to remove pages that encourage the killing of Jews, after a wave of attacks by Palestinians left nine Israelis dead.

Nitsana Darshan-Leitner, director of the Shurat HaDin organization that filed the lawsuit in the New York State Court on Monday, said the claim holds the Internet giant responsible for the presence of posts that incite violence.

Toshiba is preparing to sell its image sensor operations to Sony in a deal estimated at around $165 million, reports said Saturday.

The move would mark Toshiba's effective withdrawal from producing image sensors used for smartphones and other devices, Kyodo News said.

Russian spies likely tried to hack into the Dutch Safety Board's computer systems to access a sensitive final report into the shooting down of flight MH17 over Ukraine, experts said Friday.

The cyberattacks were revealed by security experts Trend Micro which blamed a shadowy group dubbed Operation Pawn Storm, "an active economic and political cyber-espionage operation" that has targeted the White House and NATO in the past.

The personal data of millions of Britons could be at risk after telephone and broadband provider TalkTalk was hit by a "significant and sustained" cyberattack, the company said Friday.

TalkTalk said information including customer names, addresses and bank details could have been compromised, and that it had informed London's Metropolitan Police Cyber Crime Unit.

The thing to remember about Amazon's new $50 Fire tablet is that it's a $50 tablet.

It's not as light or as thin as a tablet that costs five or six times more. The camera isn't as good, and the screen isn't as sharp. But it works well as a budget device for the basics — reading, Facebook, video and, of course, shopping on Amazon.

Twitter chief executive Jack Dorsey said Wednesday that the struggling messaging platform is in the midst of "rebooting" as it seeks to fulfill what he sees as its vital mission as a rapid source of information.

Speaking at the Twitter developers conference in San Francisco, Dorsey said the relationship with Twitter and third-party developers had become strained, but promised to work to improve the situation.