An aide-de-camp is a personal assistant or secretary to a person of high rank, usually a senior military, police or government officer, or to a member of a royal family or a head of state.
An 1843 illustration of a French aide-de-camp (right) assisting a général de division (centre) during the Napoleonic wars
Aide-de-camp Colonel Jean-Claude Cloutier with Lise Thibault, lieutenant governor of Quebec in 2006
Royal Canadian Navy shoulder boards worn by honorary aides-de-camp to the lieutenant governors of British Columbia (left) Quebec (centre), and New Brunswick (right)
Jakaya Kikwete, president of Tanzania, with his aide-de-camp (right) at Walter Reed Army Research Institute in May 2009
Adjutant is a military appointment given to an officer who assists the commanding officer with unit administration, mostly the management of human resources in an army unit. The term adjudant is used in French-speaking armed forces as a non-commissioned officer rank similar to a staff sergeant or warrant officer but is not equivalent to the role or appointment of an adjutant.
C. G. E. Mannerheim as regent of Finland (sitting) and his adjutants (from the left) Lt.Col. Kasimir Lilius, Cap. Heikki Kekoni, Lt. Akseli Gallen-Kallela, Ensign John Rosenbröijer
President of Austria Rudolf Kirchschläger and commander Karl von Wohlgemuth; the president's adjutant is in the background