The Worldwide Developers Conference is an annual trade show for Apple developers. It is commonly abbreviated to WWDC. It normally takes place in California. The attendee numbers have varied between roughly 2000 - 3500 developers in recent years. It is Apple's chance to introduce new technologies to its developers, and has been used in recent years to demonstrate and distribute preview versions of upcoming Mac OS X versions. The first WWDC was held in Monterey, CA in 1983. See Worldwide Developers Conference 1983. Locations and dates of recent WWDCs: