A student from an engineering school attends, on Meudon, west of Paris, overnight on March 16, 2013, the first edition of the Steria Hacking Challenge.

Experts say aging control systems are vulnerable to attacks.

An attendee uses a computer to sign in for the Google I/O developers conference on May 15, 2013 in San Francisco, California.

Meeting to discuss how to combat tax avoidance by major tech companies.

This file photo taken on September 27, 2005, shows a woman gathering pebbles for a living beneath a row of windmills on Bangui Bay in Ilocos Norte, northern Philippines.

A new computer-run system could better handle renewable power strategies.

Yahoo CEO Marissa Mayer speaks about the company's acquisition of Tumblr at a press conference in Times Square on May 20, 2013 in New York City.

Investors are focused on the rising value of the company's assets overseas.

A health worker gives a physical exam to a Mexican farm worker at a mobile clinic on a farm on April 30, 2013 in Brighton, Colorado.

Scanadu's tricorder device can read and provide vital signs in 10 seconds.