Design and construction Automobiles 191 Integrated circuits 128 History 111 Airplanes 103 Bridges 75 Sustainable buildings 65 Data processing 62 Very large scale integration 53 Planning 49 Environmental aspects 48 Equipment and supplies 48 Electronic apparatus and appliances 47 Motor vehicles 47 Maintenance and repair 44 Semiconductors 39 Computer-aided design 36 Roads 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