Traffic engineering
- Útügyi Napok Konferencia
- UAV-g
- UAVs International Conference
- UAVs Twenty-First International Conference
- UAV Systems Conference
- UC Extension Short Course
- Uchū Kagaku Gijutsu Rengō Kōenkai
- Uchū Kagaku Shinpojiumu
- Uchū Kankyō Shinpojiumu
- Uchū-Kōzō-Zairyō-Shinpojiumu
- U 90, International Conference on Submarine Systems
- UITP Asia-Pacific Congress
- UITP International Bus Conference
- UITP Light Rail Conference
- UITP world congress
- UK Conference
- Umweltpolitisches Kolloquium
- Underground Transmission and Distribution Conference
- Underwater photo-optical instrumentation applications
- United Engineering Foundation Conference on The Aerodynamics of Heavy Vehicles: Trucks, Buses, and Trains
- Unmanned Air Vehicle Systems International Conference
- Unmanned Systems
- Unmanned Systems North America Conference
- USA/Europe Air Traffic Management R&D Seminar
- USA/Europe Air Traffic Management Research and Development Seminar
- USA Europe ATM R&D Seminar
- USAF Aircraft Structural Integrity Program Conference
- USAF Developmental Test and Evaluation Summit
- U.S. Air Force T&E Days
- USCToMM Symposium on Mechanical Systems and Robotics
- UV Conference
- UVE 92, Internationale Kongressmesse für Umwelt, Verkehr, Energie
- UV - European Conference
- UV '93 - European Unmanned (Aerial) Vehicle Conference
- UV - International Unmanned Vehicles Conference & Exhibition