Management 190 English language 142 Maintenance and repair 142 Automobiles 117 Computer graphics 97 Mathematics 89 Programming 84 Examinations 75 Textbooks 74 Problems, exercises, etc 73 Computer networks 72 Computer games 71 Design 70 Data processing 61 Computer programs 59 Strategic planning 59 Calculus 58 Rhetoric 57 Digital techniques 55 Marketing 53 Economics 52 Certification 51 Electrical engineering 51 Research 50 Industrial management 46 Study and teaching 46 C++ (Computer program language) 45 Methodology 42 Accounting 41 Design and construction 41