UA, U-A, Ua, uA, or ua may refer to:
The UAAP Season 79 basketball tournaments are held in school year 2016-17. University of Santo Tomas is the season host while Far Eastern University are the defending champions.
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.
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.