OER or Oer may refer to:
- Odakyu Electric Railway, a Japanese railway company
- Oer family, a German noble family
- Oer-Erkenschwick, a town in North Rhine-Westphalia, Germany
- Offense efficiency rating, the average number of points scored per shot by a basketball player
- Officer Evaluation Report, an evaluation form used by the United States Army
- Open educational resources, open documents that are useful for teaching, learning, educational, assessment and research purposes
- Oregon Electric Railway, an interurban railroad line in Oregon, United States
- Örnsköldsvik Airport in Örnsköldsvik, Sweden
- Oxygen enhancement ratio, effect magnitude of ionizing radiation due to the presence of oxygen
- Oxygen Evolution Reaction, the formation of oxygen by electrochemical reduction of water
- Owner’s Equivalent Rent, an economic metric for housing prices often used in the calculation of market baskets
This disambiguation page lists articles associated with the title OER.If an internal link led you here, you may wish to change the link to point directly to the intended article. Category: