Sony Corp.'s movie studio has put theater owners on notice that it will stop paying millions of dollars per film for disposable 3-D glasses starting next May, just before it is to release a couple of summer blockbusters — "The Amazing Spider-Man" and "Men in Black III" — in 3-D.

The move was announced in a letter sent to theater owners, according to a person with the studio. The person was not authorized to speak publicly and requested anonymity.

Microsoft and Samsung Electronics are agreeing to cross-license each other's patent portfolios, with Microsoft getting royalties for mobile phones and tablets Samsung sells that run the Android operating system.

Microsoft Corp. and Samsung Electronics Co. said Wednesday that they have also agreed to work together in developing and marketing Microsoft's Windows Phone software.

Amazon unveiled a tablet computer, the Kindle Fire, on Wednesday in a challenge to Apple's market-leading iPad.

The Kindle Fire has a seven-inch (17.78-centimeter) screen, smaller than the iPad's 9.7 inches (24.6 cms), and Wi-Fi connectivity, the Seattle-based online retail giant announced at a launch event in Manhattan.

Authorities in Taiwan said Wednesday they had changed more than 690,000 traffic lights through the island in a project that will save enough electricity to power more than 60,000 homes.

Under the Tw$550-million ($18-million) project launched in 2009, the traffic lights have had their traditional bulbs replaced with technology using light emitting diodes (LEDs), the Bureau of Energy said.

Google+ was mobbed with visitors after the social network opened its doors to the public last week, industry tracker Experian Hitwise reported on Monday.

Online traffic to Google's nascent social network rocketed 1,269 percent on Wednesday, a day after the Internet titan removed the need to be invited in order to join, according to Hitwise research director Heather Dougherty.

Microsoft on Tuesday said it struck another blow in its battle against cyber crooks by busting a spam-sending network of virus-infected computers.

Along with taking down a "botnet" believed to have been used for nefarious activities including spam, stock scams, and sexual exploitation of children, Microsoft sued the owner of an online domain used to control operations.

China has ordered police nationwide to make more use of social networking sites to ensure greater openness and "dispel misunderstandings", the state Xinhua news agency said Tuesday.

Huang Ming, vice-minister of public security, delivered the message at a conference on Monday aimed at helping law enforcement officials to use China's hugely popular microblogs -- sites similar to Twitter -- the report said.

Computer security firm McAfee on Tuesday will launch a service that unifies defenses for computers, smartphones and tablets.

McAfee billed AllAccess as an unprecedented offering for coordinated protection of desktop, laptop and netbook computers along with smartphones or tablets powered by Android, Symbian, or Blackberry operating systems.

With nearly 30 million iPads sold, Apple is the undisputed tablet computer champion.

BlackBerry maker Research In Motion, U.S. computer giant Hewlett-Packard, South Korea's Samsung and scores of other companies with devices powered by Google's Android software have all taken swings at the iPad and missed.

Silicon Valley-based AOptix on Monday introduced new "e-gates" that recognize faces as well as irises of passengers before opening to let them board flights.

"This is what we call the future of passenger boarding," AOptix director of corporate communications Brian Rhea said as an InSight Duo electronic gate was tested at the San Jose International Airport in Northern California.