32 CFR 344.3 - Definitions.
(a) Reserve components. Refers collectively to the Army National Guard of the United States, Army Reserve, Naval Reserve, Marine Corps Reserve, Air National Guard of the United States, Air Force Reserve, and Coast Guard Reserve, when the Coast is operating as a Service of the Department of the Navy.
(b) Total force. The organizations, units, and individuals that comprise the Defense Department's resources for meeting the national security strategy. It includes DoD Active and Reserve military personnel, military retired members, DoD civilian personnel (including foreign national direct- and indirect-hire, as well as non-appropriated fund employees), contractor staff, and host-nation support personnel.