TED is a nonprofit devoted to spread ideas, usually in the form of short, powerful talks. TED began in 1984 as a conference where technology, entertainment, and design converged, and today covers almost all topics from science to business to global issues, in more than 100 languages.
Meanwhile, independently run TEDx events help share ideas in communities around the world, x stood for independently organized. A TEDx event is a local gathering.
TEDx events are fully planned and coordinated independently, on a community-by-community basis.