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

Apple has bought a factory in Arizona that will be re-purposed to make sapphire glass. The material is used in the iPhone 5s, seen here, as well as in the wristwatch industry. Andy Wong/AP hide caption

itoggle caption Andy Wong/AP

Angela Ahrendts is leaving her post as CEO of Burberry to head the online and retail division at Apple. She will become the first woman in the tech company's senior executive ranks. Mark Lennihan/AP hide caption

itoggle caption Mark Lennihan/AP

Apple says it has sold 9 million iPhone 5s and 5c models since their launch on Friday. Here, staff members at an Apple retail store in Beijing cheer a customer after he bought a new iPhone. Andy Wong/AP hide caption

itoggle caption Andy Wong/AP

A woman looks at her phone in front of the Apple store in Shanghai. Apple unveiled a cheaper version of the iPhone on Tuesday. Aly Song/Reuters /Landov hide caption

itoggle caption Aly Song/Reuters /Landov

Craig Federighi, senior vice president of software engineering at Apple, discusses features of the new iOS 7 during the keynote address of the Apple Worldwide Developers Conference on June 10 in San Francisco. Eric Risberg/AP hide caption

itoggle caption Eric Risberg/AP