Apple, which unveiled iOS 8 at June's Worldwide Developers Conference, says it will be technologically unfeasible for police to extract data from its new operating system. Justin Sullivan/Getty Images hide caption

itoggle caption Justin Sullivan/Getty Images

Apple CEO Tim Cook speaks in Cupertino, Calif., on Tuesday. The company unveiled a new mobile payment system called Apple Pay, which uses security built into the latest iPhones. Justin Sullivan/Getty Images hide caption

itoggle caption Justin Sullivan/Getty Images

The Samsung Galaxy Mega (from left), Samsung Galaxy S4 and Apple iPhone 5 are shown. Apple is expected to announce larger models of its smartphone on Tuesday. Richard Drew/AP hide caption

itoggle caption Richard Drew/AP

With the ability to control phone calls, texts, and audio, Apple's new CarPlay system will ensure drivers' "eyes and hands stay where they belong," the company says. CarPlay will be included in several car models this year. Apple hide caption

itoggle caption Apple

Apple CEO Tim Cook introduced the iPad Air in October 2013. The company says it is publicizing the names of suppliers that are still sourcing minerals from conflict regions. Marcio Jose Sanchez/AP hide caption

itoggle caption Marcio Jose Sanchez/AP

A 1984 Apple Macintosh Classic was on display at the Museum for Art and Industry in Hamburg, Germany, in 2011. Philipp Guelland/dapd hide caption

itoggle caption Philipp Guelland/dapd

Twitter made its debut on the New York Stock Exchange in November. Both the social media giant and the relative newcomer Snapchat are valued in the billions, but neither company has yet turned a profit. Emmanuel Dunand/AFP/Getty Images hide caption

itoggle caption Emmanuel Dunand/AFP/Getty Images