Buses Microcomputers 25 Design and construction 12 Motor vehicles 12 Computer interfaces 11 Aerodynamics 9 Safety measures 8 Automobiles 7 Air conditioning 6 Bodies 6 Chassis 6 Heating and ventilation 6 Local transit 6 Transportation 6 Trucks 6 Computer architecture 5 Animals 4 Bus drivers 4 Cooling systems 4 Data processing 4 Electronic digital computers 4 Fuel consumption 4 Heat-engines 4 Maintenance and repair 4 Monitoring systems 4 Railroad trains 4 Reservation systems 4 Very high speed integrated circuits 4 Controller Area Network (Computer network) 3 Electronic equipment 3