Washington, D.C. is the capital city of the United States of America. "D.C." is an abbreviation for the District of Columbia, the federal district coextensive with the city of Washington. The city is named after George Washington, military leader of the American Revolution and the first President of the United States.
Southeast (SE or S.E.) D.C. is the southeastern quadrant of the city, located south of East Capitol Street and east of South Capitol Street. It has a rich cultural history, including the historic Anacostia neighborhood, the Navy Yard, the Anacostia River waterfront, the remains of several Civil War-era forts, RFK Stadium and the Congressional Cemetery.
Southwest (SW or S.W.) is the southwestern quadrant of D.C., located south of the National Mall and west of South Capitol Street. It is the smallest quadrant of the city. Southwest is small enough that it is frequently referred to as a neighborhood in and of itself.