Machine design 1,035 Machine-tools 991 Machining 574 Machine learning 420 Numerical control 391 Metal-cutting tools 311 Metal-cutting 235 Design and construction 233 Milling-machines 231 Machine-shop practice 226 Human-machine systems 225 Surface roughness 200 Cutting machines 185 Machine theory 143 Programming 140 Automation 131 Data processing 114 Machinery 107 Materials 104 Manufacturing processes 101 Engineering design 90 Grinding machines 79 Human engineering 75 Machine parts 73 Programmable controllers 73 Machine 72 Automatic control 71 Design 68 Data mining 62 Artificial intelligence 58