The Advanced Research Projects Agency (ARPA) gained a “D” when it was renamed the Defense Advanced Research Projects Agency (DARPA) in 1972.
The Agency’s name briefly reverted to ARPA in 1993, only to have the “D” restored in 1996.
Redefining Possible
Since 1958, DARPA has been an engine of innovation serving national defense and the U.S. warfighter.