UA, U-A, Ua, uA, or ua may refer to:
The UAAP Season 80 volleyball tournaments started on September 9, 2017 with the junior tournaments. The games were played at the Filoil Flying V Centre, Mall of Asia Arena, Smart Araneta Coliseum and the Blue Eagle Gym.
The UAE Pro-League, known for sponsorship reasons as the Arabian Gulf League, is the top professional football league in the United Arab Emirates (UAE).
The UAAP Season 78 high school volleyball tournament will start on August 22, 2015. The tournament venue will be at the Adamson University Gym in San Marcelino St., Ermita, Manila.
Unmanned aerial vehicles (UAVs) or drones have frequently been involved in military operations. Non-military UAVs have often been reported as causing hazards to aircraft, or to people or property on the ground.