TED is a nonprofit organization devoted to Ideas Worth Spreading. Started as a four-day conference in California more than 30 years ago, TED has grown to support its mission with multiple global initiatives. The annual TED Conference invites the world's leading thinkers and doers to speak for 18 minutes or less to share one idea worth spreading. Many of these talks are then made available, free, at TED.com. Today nearly 2,000 TED Talks are available to watch free on TED.com and other platforms.