Naval art and science Biography -- See Naval biography Here are entered works discussing collectively persons engaged in all areas of naval and maritime activity, including civilian members of the naval establishment, political leaders, members of merchant marines, navies, etc. --subdivision Biography under classes of persons and names of individual navies, e.g. Admirals--Biography; United States. Navy--Biography
--subdivision Artillery under names of individual armies, e.g. United States. Army--Artillery; also subdivision Artillery operations under individual wars, e.g. World War, 1939-1945--Artillery operations; and names of individual artilleries
Naval astronautics -- See Astronautics, Military Here are entered works on the military applications of space sciences. Works on interplanetary warfare, attacks on earth from outer space, or warfare among the nations of earth in outer space, are entered under Space warfare.
--subdivision Communication systems under names of individual military services, e.g. United States. Navy--Communication systems; and subdivision Communications under individual wars, e.g. World War, 1939-1945--Communications