Computer science 287 Management 238 Mathematics 192 Economics 129 Marketing management 119 Engineering 118 Genetics 117 Sociology 106 Psychology 86 Criticism 83 Education 81 Statistics 77 History 72 Biochemistry 70 English literature 65 Chemistry 64 Plant propagation 64 Security analysis--Portfolio management 60 plant layering 60 Financial management 59 plant harvesting 59 Marketing research 58 Marketing 55 Organizational behaviour 54 Biology 50 Data processing 50 Ecology 50 Data mining 49 Cytology 48 R (Computer program language) 48