Google Play was launched.
The app store gives android users a platform to find and install applications.
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Inventor Chester Carlson created the first Xerox image.
Microsoft released the Windows 7 operating system.
The Walt Disney World Resort in Florida received its 100-millionth visitor.
The American drama movie 'Now, Voyager' premiered in New York City, US.
The Royal Observatory in Greenwich, UK, was adopted as the world's Prime Meridian.