Design and construction Roads 202 Congresses 130 Data processing 75 Integrated circuits 72 Automobiles 65 Bridges 52 Very large scale integration 43 Maintenance and repair 37 Boatbuilding 36 Hospitals 32 Pressure vessels 32 Dams 30 Electronic digital computers 30 Pavements 29 Equipment and supplies 28 Farm equipment 28 Airplanes 26 Computer-aided design 26 Safety measures 26 Handbooks, manuals, etc 23 Planning 22 Standards 22 Buildings 21 Bibliography 20 Piping 20 Wooden boats 20 Electronic apparatus and appliances 19 Pavements, Concrete 18 History 17