TED stands for Technology, Entertainment, Design and it's a yearly conference in Long Beach in California that started in 1984.
TED is something really cool and also worth many hours of your time once you are hooked on it. TED gives the worlds most facinating thinkers and doers this simple task: Give us the best talk of your life, (in 18 minutes or less). One invited speaker asked about this and said "I don't know what to say", and got the reply "Don't worry, just be profound". So you can imagine how good theese talks are!