Products: US Department of Defense

The United States Department of Defense (DOD or DoD) is the federal department charged with coordinating and supervising all agencies and functions of the government relating directly to national security and the military. The DOD has three major components - the U.S. Army, the U.S. Navy, and the U.S. Air Force. Among the many DOD agencies are the Ballistic Missile Defense Organization, the Defense Advanced Research Projects Agency (DARPA), the Defense Intelligence Agency (DIA), the National Geospatial-Intelligence Agency (NGA), and the National Security Agency (NSA). The department also operates several joint service schools, including the National War College.