From the BarCampRDU wiki:

"A BarCamp is an unconference where people interested in a wide range of technologies come together to teach and learn. Unfamiliar with the un-conference format? Here's the idea in a nutshell. Rather than having scheduled speakers, everyone pitches sessions the morning of theBarCamp. Those sessions are put on a schedule, and lots of little groups form for intense group learning. Everyone is expected to teach, to talk, to participate. Yeah, its different from a regular conference - but it works!"

BarCampRDU ran for six years at Red Hat headquarters. The first BarCampRDU was organized by Fred Stutzman and a team of other volunteers. 

Edit tags