Air -- Pollution -- European Union countries Automobiles -- Motors -- Exhaust gas Transportation -- Environmental aspects -- European Union countries

Technology transfer -- Periodicals Technology transfer -- European Economic Community countries -- Periodicals Technology transfer -- European Union countries -- Periodicals.

Business enterprises -- Computer networks -- Management Information technology -- Management Management information systems Electronic commerce -- Management Internet

Railroads -- Automatic train control -- Europe -- Planning Railroads -- Europe -- Signaling -- Safety measures -- Specifications Digital communications -- Standards Mobile communication systems -- European Union countries Computer network architectures -- Safety measures

Communication -- Psychological aspects Internet -- Psychological aspects Computer networks -- Psychological aspects

Computer networks -- United States Information networks -- United States Computer industry -- United States Telecommunication -- United States Reading materials