Indian search engine Just Dial's initial public offer to raise $174 million was oversubscribed nearly 12 times in what marked the country's biggest IPO this year, stock exchange data showed Thursday.

The figures were released after the share offer, one of the largest to date by an Indian Internet firm, closed Wednesday.

Twitter said Wednesday it was stepping up security measures for the popular messaging service following a series of high-profile breaches by hackers hitting media organizations and others.

Twitter said it would implement a new login verification system, "a form of two-factor authentication" which is "a second check to make sure it's really you" when a user signs in.

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.