Excellent Glossary of terms: http://www.ediplomat.com/nd/glossary.htm http://www.washdiplomat.com/glossary.html Acronyms in American Diplomacy: http://www.aafsw.org/state/glossary1.htm
In the United States Foreign Service: In the United States Foreign Service, a system of personal ranks is applied which roughly corresponds to these diplomatic ranks. Personal ranks are differentiated as "Senior Foreign Service" (SFS) or "Foreign Service Officer" (FSO). The SFS ranks, in descending order, are Career Ambassador, awarded to career diplomats with extensive and distinguished service; Career Minister, the highest regular senior rank; MinisterCounselor; and Counselor. In U.S. terms, these correspond to 4, 3, 2 and 1star General and Flag officers in the military, respectively. Officers at these ranks may serve as Ambassadors and the most senior positions in diplomatic missions. FSO ranks descend from FS1, equivalent to a full Colonel in the military, to FS9, the lowest rank in the U.S. Foreign Service personnel system.[2] (Most FSOs begin at the FS5 or FS6 level.) Personal rank is distinct from and should not be confused with the diplomatic or consular rank assigned at the time of appointment to a particular diplomatic or consular mission. In a large mission, several Senior Foreign Service Officers may serve under the Ambassador as MinisterCounselors, Counselors, First Secretaries, and Attaches; in a small mission, an FS2 may serve as the lone MinisterCounselor of Embassy. See also (Titles and Ranks in Diplomacy): http://www.state.gov/documents/organization/ 89585.pdf In the British Diplomatic Service: As in the US Foreign Service, the British Diplomatic Service differentiates between officers in the "Senior Management Structure" (SMS; equivalent to the Senior Civil Service grades of the Home Civil Service) and those in the "delegated grades". SMS officers are classified into three paybands, and will serve in the Foreign and Commonwealth Office in London as (in descending order of seniority) Permanent UnderSecretary, DirectorsGeneral, Directors, or Heads of Group; overseas they will be Ambassadors (High Commissioners in Commonwealth countries), or ConsulsGeneral, Deputy Heads of Mission or Counsellors for larger posts. (Deputy Heads of Mission at the historically most significant Embassies, for example those in Washington and Paris, are known as Ministers.) In the "delegated grades", officers are graded by number from 1 to 7; the grades are grouped into bands lettered AD (grades 1 and 2 are in Band A; 3 in B; 4 and 5 in C; and 6 and 7 in D). Overseas, B3grade officers are Third Secretaries; C4s are Second