A-100 is the colloquial name given to the introductory/orientation training class for incoming Foreign Service Officers. These courses are taught in the Foreign Service Institute at the National Foreign Affairs Training Center in Arlington, Virginia. The purpose of the class is to provide orientation to the United States Department of State, information on embassy operation and foreign affairs, intelligence collection and dissemination, State Department computer systems, and the roles different categories of personnel perform in the conduct of diplomacy. It is the basic job-orientation course for the United States Foreign Service before diplomats branch off into different career tracks or geographic specialties.