TED (Technology Entertainment and Design) is a global set of conferences owned by the private non-profit Sapling Foundation, formed to disseminate "ideas worth spreading."The first TEDx Canberra was held at the National Library of Australia on 24 October 2010.
TED was founded in 1984 as a one-off event and the conference was held annually from 1990 in Monterey, California. ...
TED grants licenses to third parties to hold free TEDx events in cities around the world. 
From: TED (conference), Wikipedia, 11 September 2011 at 18:15.
Saturday, September 24, 2011
What is TEDx?
While helping out at TEDx Canberra 2011 today, at the National Library of Australia (NLA) in Canberra, I was asked "What is TEDx Canberra?". I said that TEDx is a local version of an event where people speak on ideas, which started 20 years ago in California and that this was the second to be held in Canberra. But I was asked what "TED" stood for, so I thought I should look it up: