Operations research 514 Production and operations management--Product management 291 Engineering & allied operations 120 Management 118 Operational calculus-- Functional analysis-- Mathematics 109 Operations Research-- Information management-- Executive management 106 Production management 103 Operations management 100 Production and operations management 85 Operations Research--Information management--Executive management 80 Co operation 67 Co-operative management 66 Agribusiness Management 55 Linear programming 55 Census-India 46 Economics 43 Agribusiness management 38 Supply chain management 31 Travel Management --Travel agency and tour operations managmenet 29 Applied physics 27 Tourism travel--Travel Management --Travel agency and tour operations managmenet 25 Production management--Industrial management 24 India 23 Operation research 23 History 22 Industrial management 22 Operational amplifiers 22 Mathematics 20 Programming (Mathematics) 19 Kerala-Census (1991) 18