History of engineering & technology Technology: general issues 12 Energy industries & utilities 2 European history 2 20th century 1 21st century 1 Conservation of buildings & building materials 1 Earth sciences, geography, environment, planning 1 Economic systems & structures 1 English 1 History 1 History of ideas 1 History of science 1 International relations 1 Management of specific areas 1 Materials science 1 Mineralogy & gems 1 Natural disasters 1 Social & cultural history 1 United Kingdom, Great Britain 1 Warfare & defence 1 c 1700 to c 1800 1 c 1800 to c 1900 1 c 1900 - c 1914 1 c 1914 to c 1918 (including WW1) 1 c 1918 to c 1939 (Inter-war period) 1 c 1939 to c 1945 (including WW2) 1 c 1945 to c 1960 1 c 1945 to c 2000 (Post-war period) 1 c 1960 to c 1970 1