The Apple WWDC keynote also serves as a major product launch event. Products that have launched during the Apple WWDC keynote include the Mac Pro, the iPhone 3GS and 4, iWork for iCloud and multiple new versions of the iOS and OS X operating systems.
The conference has always taken place in California, most recently at the Moscone Center in San Francisco, and it typically occurs in the summertime. During the event, Apple presents sessions where attendees can learn about new technologies and features for upcoming products. Attendees can also test some of these products in hands-on labs.
Unlike at most major technology vendors' conferences, attendees at the Apple Worldwide Developers Conference are required to sign a non-disclosure agreement (NDA). The NDA covers all of the content presented at the event, except for the keynote.