OEC
OEC may refer to:
- The Otis Elevator Company ( OTIS ), a manufacturer of elevators and escalators
- OEC AG, a light research institute that deals with the optimization of optical systems.
- The train - category ÖBB Euro City (ÖBB -EC), a former premium brand of the ÖBB.
- The Ecumenical Centrale, office of the Council of Christian Churches (actually ÖC )
- Disambiguation
- Abbreviation