Design and construction Automobiles 195 Integrated circuits 128 History 111 Airplanes 103 Bridges 77 Sustainable buildings 66 Data processing 62 Very large scale integration 53 Environmental aspects 49 Planning 49 Equipment and supplies 48 Electronic apparatus and appliances 47 Motor vehicles 47 Maintenance and repair 44 Semiconductors 39 Roads 37 Computer-aided design 36 Health facilities 34 Architecture 32 Buildings 32 Printed circuits 32 Safety measures 31 Materials 30 Radio circuits 30 Standards 30 Testing 30 Chemical plants 29 Design 29 Motors 29