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The Office of the Secretary of Defense (OSD) is a headquarters-level staff of the United States Department of Defense.It is the principal civilian staff element of the U.S. Secretary of Defense, and it assists the Secretary in carrying out authority, direction and control of the Department of Defense in the exercise of policy development, planning, resource management, fiscal, and program ...
It was formed approximately 4.5 billion years ago, is a terrestrial planet and is the second smallest of the Solar System 's planets with a diameter of 6,779 km (4,212 mi). A Martian solar day ( sol) is 24.5 hours and a Martian solar year is 1.88 Earth years (687 Earth days). Mars has two small and irregular natural satellites: Phobos and Deimos.
On 1 January 1977, the United States Army Intelligence and Security Command (INSCOM) was organized at Arlington Hall Station, Virginia, to provide the U.S. Army with a single organization for conducting multi-discipline intelligence, security operations, and electronic warfare at the level above corps. The new organization merged the former U.S ...
The Missile Defense Agency (MDA) is a component of the United States government's Department of Defense responsible for developing a comprehensive defense against ballistic missiles. It had its origins in the Strategic Defense Initiative (SDI) which was established in 1983 by Ronald Reagan and which was headed by Lt. General James Alan Abrahamson .
The armed forces consist of six service branches: the Army, Marine Corps, Navy, Air Force, Space Force, and Coast Guard. [14] [15] All six armed services are among the eight uniformed services of the United States. [16] Each of the different military services is assigned a role and domain. The Army conducts land operations, while the Navy and ...
Username, email, or mobile. yahoo.com; gmail.com; outlook.com; aol.com; Forgot username? Create an account. x. AOL works best with the latest versions of the browsers ...
Acronyms[edit] Open Web Analytics, open source web analytics software. Open-world assumption, formal reasoning with incomplete knowledge. Optimized wideband array antenna, a type of Yagi–Uda antenna. Ordered weighted averaging aggregation operator, a class of operator used in fuzzy logic. Outlook Web App, a web-based email client, now part of ...
United StatesArmed Forces. The Defense Information Systems Agency ( DISA ), known as the Defense Communications Agency ( DCA) until 1991, is a United States Department of Defense (DoD) combat support agency composed of military, federal civilians, and contractors.