History 232 World War, 1939-1945 183 Naval operations 124 Biography 69 Naval strategy 67 Sea-power 58 Naval art and science 55 History, Naval 53 Naval operations, American 53 Submarine 50 Qaida (Organization) 49 Malay fiction 43 Campaigns 39 Terrorism 37 First aid in illness and injury 32 Naval aviation 30 Naval history 30 Naval operations, British 30 Islam 27 Naval battles 26 Warships 24 Juvenile literature 23 Aids and devices 22 Naval architecture 22 Teaching 22 Computer-aided design 21 Naval operations, German 20 Admirals 19 Aircraft carriers 19 Military policy 19