Finance 12,560 AIDS (Disease) 11,067 History 11,023 Law and legislation 10,390 Federal aid to education 5,551 Prevention 5,174 Education 5,155 Mais ... Study and teaching 4,988 Grants-in-aid 4,707 Government policy 4,601 Computer-aided design 4,300 Student aid 4,300 Aids and devices 4,186 Politics and government 4,087 Federal aid to transportation 4,071 Audio-visual aids 4,012 Teaching 3,990 General 3,957 Histoire 3,913 Data processing 3,746 Research 3,675 Economic assistance, American 3,635 Social aspects 3,493 Economic conditions 3,263 Public welfare 3,242 Appropriations and expenditures 3,073 Federal aid to higher education 2,932 Acquired Immunodeficiency Syndrome 2,922 HIV infections 2,871 Social conditions 2,785 menos ...