Apple has asked a federal judge in Silicon Valley to add Samsung's new flagship Galaxy smartphone to the list of devices targeted in a patent lawsuit involving Siri personal assistant software.

The motion to amend the lawsuit to include the Galaxy S4 will be on the agenda of a June 25 hearing before U.S. District Court Judge Paul Grewal in the California city of San Jose.

South Korea's Samsung Electronics said Thursday its latest flagship Galaxy S4 had become its fastest selling smartphone to date, topping 10 million units globally less than a month after its debut.

A company statement said the S4 had already passed the 10-million sales mark following its April 26 launch. It's predecessor, the S3, took 50 days to reach the same threshold.

Facebook on Wednesday became a full member of the Global Network Initiative, a non-governmental organization promoting Internet freedom and privacy rights.

The announcement came one year after the world's biggest social network gained observer status at GNI, whose corporate members include Microsoft, Yahoo! and Google.

American teenagers are sharing more information about themselves on social media sites, but taking steps to protect their privacy online, a study showed Tuesday.

The new survey showed 91 percent of those surveyed posted a photo of themselves, up from 79 percent in 2006; 71 percent post the city or town where they live; and 53 percent posted their email address.

U.S. online giant Amazon has unveiled plans for a futuristic greenhouse style headquarters "where employees can work and socialize in a more natural, park-like setting."

The Internet company revealed photos and sketches this week of the plan to be submitted to Seattle city officials, becoming the latest of the technology heavyweights to unveil a bold new headquarters plan.

Microsoft on Tuesday staked a claim to the Internet Age living room with an eagerly awaited new generation Xbox One console touted as a home entertainment hub that goes far beyond games.

"Today, we put you at the center of a new generation in the living room," said Don Mattrick, head of Microsoft's interactive entertainment business, unveiling the new version of the popular game console.

German software giant SAP said on Tuesday it intended to employ hundreds of people globally with autism as software testers and programmers over the next seven years.

The company, which has already launched pilot projects in India and Ireland, said the move aimed to find workers "who think differently", leading to innovation.

The world's most valuable company, Apple Inc., employs a group of affiliate companies located in Ireland to avoid paying billions of dollars in U.S. income taxes, a Senate investigation has found — and its CEO will be questioned Tuesday.

Apple is holding overseas some $102 billion of its $145 billion in cash, and an Irish subsidiary that earned $22 billion in 2011 paid only $10 million in taxes, according to the report issued Monday by the Senate Permanent Subcommittee on Investigations.

Microsoft offers a glimpse Tuesday at a new-generation Xbox as videogame consoles evolve into home entertainment centers and adapt to competition from smartphones and tablets.

A tented stage has been set up at the technology giant's headquarters in the city of Redmond in Washington State for an "Xbox Reveal" event to play out just weeks before a major annual E3 videogame conference in Los Angeles.

Yahoo! announced Monday it would acquire blogging platform Tumblr for $1.1 billion, saying the two companies "share a vision to make the Internet the ultimate creative canvas."

The two firms confirmed weekend reports of the tie-up, in a deal which helps the struggling Internet pioneer connect with Tumblr's youthful users.