Directorate of Defense Trade Controls

The Directorate of Defense Trade Controls (DDTC) is "[t]he office at the Department of State, formerly known as the Office of Defense Trade Controls and before that as the Office of Munitions Control, responsible for reviewing applications to export and reexport items on the U.S. Munitions List."

Source
U.S. Export Administration Regulations, Part 772 (15 C.F.R. §772.1).