This atlas provides basic information about the North Atlantic Treaty Organization (NATO). Formed in response to growing concern for the security of Western Europe after World War II, NATO is a vehicle for Western efforts to reduce East-West tensions and the level of armaments. NATO promotes political and economic collaboration as well as military defense. The atlas consists of displays and narrative that illustrate and discuss the following information concerning NATO: membership and area, the Warsaw Pact, responsibilities, burdensharing, integrated commands and infrastructure, standardization of weapons, military forces, transatlantic deployment and logistics, nuclear forces, naval forces, military presence outside the NATO area, Soviet-bloc military presence in the Third World, military expenditures, West European and North Atlantic economic cooperation, trade, overseas import dependency, and security pacts. (RM)