Periodicals 8 Afro-Americans 5 Employment 5 Handbooks, manuals, etc 5 Mechanical engineering 5 Manufacturing processes 4 Materials handling 4 Data processing 3 Dictionaries 3 Engineering 3 Machine-shop practice 3 Machine-tools 3 Ventilation 3 Agriculture 2 Case studies 2 Collective bargaining unit 2 Congresses 2 Interchangeable mechanisms 2 Law and legislation 2 Machinery 2 Machinery industry 2 Machinery, Kinematics of 2 Management 2 Mechanical movements 2 Physical geography 2 Plastics 2 Production engineering 2 Programmed instruction 2 Quality control 2 Robotics 2