The Command division was the corps of officers and crewmen within Starfleet who specialized in command and control functions on starbases, aboard starships, and numerous Starfleet Command positions.
Members of the Command division were trained in leadership and had tactical training allowing them to decisively take action in organizing and mobilizing Starfleet crews to perform missions. Command officers included most all of the admiralty, captains, executive officers, adjutants, and pilots (flight control officers, navigators, and helmsmen).
Outside of Starfleet, those in a Command career path possessed equivalent skills in their organizations.