History 622,122 Politics and government 394,578 Claims 240,675 Law and legislation 229,108 Bills, Private 223,928 Foreign relations 107,230 Finance 66,148 Government policy 64,100 Education 48,392 Appropriations and expenditures 47,015 Budget 45,322 Armed Forces 44,644 Economic conditions 43,467 Taxation 42,130 Research 41,890 African Americans 41,569 Social conditions 41,262 Diplomatic relations 40,571 International relations 40,393 Prevention 40,153 Expenditures, Public 38,666 Economic aspects 37,647 Officials and employees 37,317 Women 35,963 Presidents 35,936 Management 35,330 Slavery 33,986 Legal status, laws, etc 31,523 Periodicals 30,655 Study and teaching 30,233 Biography 29,927 Social aspects 29,918 States 29,378 Political science 28,363 Statistics 27,828 History and criticism 27,213 Evaluation 26,196 Medical care 26,107 Employment 25,849 World War, 1939-1945 25,747 Railroads 25,022 Description and travel 24,124 Race relations 23,958 Indians of North America 23,885 Social life and customs 23,458 Commerce 23,180 Civil rights 22,143 Popular music 22,050 Emigration and immigration 21,395 American 21,004 Histoire 20,742 Jews 20,689 Employees 20,569 Economic policy 20,485 Housing 20,348 Law 19,506 General 19,455 Relations 18,987 National security 18,964 Political aspects 18,662 Veterans 18,229 Environmental aspects 17,939 Services for 17,058 Congresses 17,007 Public lands 16,986 Standards 16,968 Tariff 16,761 Universities and colleges 16,335 Labor unions 16,141 Soldiers 15,995 Agriculture 15,971 Banks and banking 15,852 Safety measures 15,852 Transportation 15,831 Older people 15,749 Foreign economic relations 15,479 Bibliography 15,421 Economic history 15,233 Governmental investigations 15,194 Salaries, etc 15,188 Small business 15,160 Rules and practice 14,870 Travel 14,818 Civilization 14,641 Income tax 14,602 Administrative agencies 14,293 Wages 14,270 Terrorism 14,025 Religious aspects 13,694 World War, 1914-1918 13,393 Pollution 13,345 Planning 13,192 Regimental histories 13,104 Population 12,857 Prices 12,758 Constitutional law 12,669 Public opinion 12,595 Architecture 12,577 Campaigns 12,475 Military policy 12,301