executive department - a federal department in the executive branch of the government of the United States

DARPA, Defense Advanced Research Projects Agency - the central research and development organization for the United States Department of Defense; responsible for developing new surveillance technologies since 9/11

Department of Defense Laboratory System, LABLINK - a defense laboratory that provides essential services in fundamental science for national security and environmental protection and provides technologies that contribute to industrial competitiveness

United States Navy, US Navy, USN - the navy of the United States of America; maintains and trains and equips combat-ready naval forces

U. S. Air Force, United States Air Force, US Air Force, USAF - the airforce of the United States of America; defends the United States through control and exploitation of air and space

Defense Intelligence Agency, DIA - an intelligence agency of the United States in the Department of Defense; is responsible for providing intelligence in support of military planning and operations and weappons acquisition

Defense Logistics Agency - a logistics combat support agency in the Department of Defense; provides worldwide support for military missions

Defense Technical Information Center, DTIC - the agency in the Department of Defense that provides scientific and technical information to federal agencies and their contractors

National Reconnaissance Office, NRO - an intelligence agency in the United States Department of Defense that designs and builds and operates space reconnaissance systems to detect trouble spots worldwide and to monitor arms control agreements and environmental issues and to help plan military operations

National Security Agency, NSA - the United States cryptologic organization that coordinates and directs highly specialized activities to protect United States information systems and to produce foreign intelligence information

U. S. Army, United States Army, US Army, USA - the army of the United States of America; organizes and trains soldiers for land warfare

Ballistic Missile Defense Organization, BMDO - an agency in the Department of Defense that is responsible for making ballistic missile defense a reality

Defense Information Systems Agency, DISA - a combat support agency in the Department of Defense responsible for developing and operating and supporting information systems to serve the needs of the President and the Secretary of Defense and the Joint Chiefs of Staff

National Imagery and Mapping Agency, NIMA - a combat support agency that provides geospatial intelligence in support of national security

Casualty Care Research Center, CCRC - an agency in the Department of Defense that is a national center for research on all aspects of injury control and casualty care