Congresses 130 Data processing 126 Mathematical models 88 Management 86 Accounting 71 History 53 Case studies 52 Industrial management 52 Handbooks, manuals, etc 43 Mathematics 42 Business 41 Education 41 Design and construction 39 Mathematical statistics 39 Programming 39 Engineering 37 Electronic digital computers 35 Chemistry, Organic 33 Chemistry 31 Operations research 31 Polymers 31 Programmed instruction 30 Physics 29 Politics and government 29 Research 29 Biochemistry 28 Electronic data processing 28 Finance 28 Materials 28 System analysis 28