Official: The upcoming event will focus on four main Apple «Operating System»: iOS 10, OS X 10.12, watchOS and tvOS. It is likely, Apple almost immediately release a public beta version of the new operating system. The release of the final version in the fall.
Worldwide Developers Conference, commonly abbreviated WWDC - Worldwide Developers Conference Apple's platform, which is held annually in the United States. Historically, it has always become a place for the presentation of the new software, and this year's event will be no exception.
Developers listen to during the WWDC 2016 a series of lectures, take part in hands-on labs and meetings with Apple experts.
Which features will be added in iOS 10 and OS X 10.12 is not currently known. Some analysts argue that the mobile operating system will be more open to the users, and might even download the official manager will be in it, allows downloading any files from the network on the iPhone and iPad, and then share them.