Industrial engineering 49 Operating Procedures, Materials Treatment Engineering 27 Materials science 16 Machinery 13 Materials Science 13 Metallic Materials 13 Metals 13 Manufacturing industries 11 Manufacturing, Machines, Tools 11 Tools 11 Surfaces (Technology) 6 Surfaces and Interfaces, Thin Films 6 Thin films 6 Machinery and Machine Elements 5 Ceramics, Glass, Composites, Natural Methods 4 Chemical engineering 4 Engineering Economics, Organization, Logistics, Marketing 4 Engineering Thermodynamics, Heat and Mass Transfer 4 Engineering economy 4 Heat 4 Heat engineering 4 Industrial Chemistry/Chemical Engineering 4 Industrial safety 4 Mass transfer 4 Quality Control, Reliability, Safety and Risk 4 Quality control 4 Reliability 4 Thermodynamics 4 Transmission 4