While Internet giants like Twitter and Google champion free speech, the U.S. listing document for Chinese microblogging platform Weibo is littered with 56 pages of warnings on the risks of operating in a country which seeks to control information.

Weibo Corp., a subsidiary of Chinese Internet behemoth Sina, has filed for a $500 million stock offer in the United States, the ultimate exercise in capitalism, as it seeks funds to grow users in the face of pressure from newer competitors.

The National Security Agency has developed a surveillance system that can record 100 percent of a foreign country's telephone calls, The Washington Post reported late Tuesday.

The system allows the agency to review conversations up to a month after they take place, the Post said. It quoted people with direct knowledge of the effort and documents supplied by former intelligence contractor Edward Snowden.

Google said Tuesday it was bringing Android to wearable devices, as LG and Motorola started the countdown to Internet-enabled watches based on the dominant platform for smartphones.

The move allows developers to create apps for smartwatches, the first phase of the Android Wear platform.

Just Eat, an online food ordering service, has announced plans to float its shares on the London Stock Exchange.

The company, which lets customers order takeout food from local restaurants, plans to raise 100 million pounds ($166 million) in an initial public offering to expand its service.

Microsoft Corp. on Monday released a version of its OneNote note-taking software for Macs and added new features and a free tier for all of the software's users in moves clearly targeted at up-and-coming productivity software rival Evernote.

The moves offer more consumers a taste of its Office 365 suite of software, which normally costs $99 a year. The free version of OneNote keeps some functions that give it an edge over the free tier of Evernote, including offline access to notes and the ability for multiple people to work on the same note simultaneously.

Japan held a government-wide cyber security drill Tuesday in a bid to improve coordination among public agencies and major businesses, as Tokyo prepares to host the 2020 Summer Olympics.

The mock cyber attack for the first time brought together 21 government departments and firms in 10 business sectors, including utilities, banking and aviation.

Americans might have embraced the latest gadgets but they are still partial to getting at least some of their news the old-fashioned way.

Adults in the United States tend to frequently move from one device or platform to another -- television and print newspapers among them -- as they follow current events, a survey released Monday found.

Measuring performance, providing a soundtrack and giving real-time information about the slopes: the latest ski masks are revolutionizing skiing, but can they crossover into the mainstream, or will they remain stuck with a niche market of rich geeks?

Worthy of a James Bond gadget, these large ski goggles are equipped with an integrated screen in the bottom-right of the view that relays information sent by Bluetooth, wifi and GPS.

Shaped like a lopsided headband, Google Glass is an unassuming piece of technology when you're holding it in your hands. You feel as if you can almost break it, testing its flexibility. Putting it on, though, is another story.

Once you do, this Internet-connected eyewear takes on a life of its own. You become "The Person Wearing Google Glass" and all the assumptions that brings with it —about your wealth, boorishness or curiosity. Such is the fate of early adopters of new technologies, whether it's the Sony Walkman, the first iPod with its conspicuous white earbuds, or the Segway scooter. Google calls the people who wear Glass "explorers," because the device is not yet available to the general public.

Under London's streets in Winston Churchill's World War II bunker, young techies are fighting a new kind of war.

Bent over their computers in a steel-reinforced room, dozens of amateur cyber security experts spent Friday racing to understand why Britain's banking network suddenly seemed to have gone offline.