iTunes Radio is an Internet radio service by Apple Inc. Announced at the 2013 Apple Worldwide Developers Conference (WWDC) on June 10, 2013, the service launched on September 18, 2013, the same day as iOS 7.
The format, having first been applied by websites such as Gizmodo, Engadget, Techcrunch and Macworld in 2003-2005 for coverage of technology-related events (such as the Macworld Expo's series of Stevenotes and the WWDC) first gained notoriety among news organizations during the coverage of the 2009 anti-government protests in Iran.
In June 2010 at the World Wide Developers Conference, Apple announced version 4 of Xcode during the Developer Tools State of the Union address.
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In June 2013 at the World Wide Developers Conference, Apple announced version 5 of Xcode.
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The engine was first demonstrated at the WWDC 2007 by John D. Carmack on an eight-core computer; however, the demo used only a single core with single-threaded OpenGL implementation running on a 512 MB 7000 class Quadro video card.