Twitter released a scorecard showing its workforce — like other major tech firms — is largely male and white. Jeff Chiu/AP hide caption

An attendee wears an Oculus Rift HD virtual reality headset at the International Consumer Electronics Show in Las Vegas. Robyn Beck/AFP/Getty Images hide caption

German computer scientists were able to transmit data using computers' speakers and microphones. iStockphoto hide caption

Federal Reserve Board Vice Chairman Janet Yellen is considered a top candidate to replace Ben Bernanke now that Lawrence Summers has withdrawn his name for contention for the Fed's top job. Robert Galbraith/Reuters/Landov hide caption

Amazon CEO Jeff Bezos, who purchased The Washington Post, is the latest big-name tech entrepreneur to buy a struggling media company. Rick Wilking/Reuters/Landov hide caption

An NBC store is seen through a window reflecting Rockefeller Center in New York City. Comcast, the nation's largest cable company, has owned 51 percent of NBCUniversal since 2011. Chris Hondros/Getty Images hide caption

Black taxis drive down The Mall in London. A Chinese company rescued the British automaker that manufactures the famous cabs. Pierre-Philippe Marcou/AFP/Getty Images hide caption

In this Oct. 20, 2012 photo, people line up to enter a newly opened Apple Store in Beijing. Exxon has once again surpassed Apple as the world's most valuable company after the iPhone and iPad maker saw its stock price falter. Andy Wong/AP hide caption

Meet the Press host David Gregory holds what he described as a high-capacity ammunition magazine during the Dec. 23 program. Uncredited/AP hide caption

Why Is Facebook CEO Mark Zuckerberg Smiling? Maybe because someone might be willing to pay $100 to send him a message. Paul Sakuma/AP hide caption

Panda cub Xiao Liwu was eager to play with a plastic ball during an exam last month. He made his public debut at the San Diego Zoo on Thursday. Ken Bohn/San Diego Zoo/AP hide caption

Care To Share? Wireless carriers are launching programs allowing customers to receive rewards based on information their smartphones share — such as their location, app usage and Web surfing data. AFP/AFP/Getty Images hide caption

Amazon Kindle vice president Peter Larsen holds the Kindle Fire HD at the introduction of the new tablet in Santa Monica, Calif., on Thursday. Reed Saxon/AP hide caption