TED stands for Technology, Entertainment, Design. It started out (in 1984) as a conference bringing together people from those three worlds. Since then its scope has become ever broader.
The annual conference now brings together the world's most fascinating thinkers and doers, who are challenged to give the talk of their lives (in 18 minutes). Every presentation is available as a high quality video stream. This site is well worth a visit!
Bill Gates, Al Gore, Richard Branson, Stewart Brand, Richard Dawkins and many more great thinkers of our time have presented at TED. All their presentations are available.
Click here to go to TED.com