Topology-- Mathematics 19 Advertising 18 Mathematics 15 Differential equations-- Analysis-- Mathematics 14 History 14 Differential equations 11 Topology 10 Management information systems 7 Biology 6 Electronics and communication engineering; Applied physics 6 Statistics 6 Drew, Nancy (Fictitious character) 4 Fiction 4 History and criticism 4 Information management 4 Modern Soiological Theory-- Ethnomethodology-- Feminist Theory-- Contemporary Theory 4 Philosophy 4 Sociology 4 Calculus 3 Communication in marketing 3 English 3 Journalism 3 Labor economics 3 Management 3 Mathematical analysis 3 Schools of economic thought-- Economics 3 Social responsibility of business 3 Topological groups 3 Algebra-- Mathematics 2 Analysis 2