OER may stand for: *OER - the

IATA airport code An IATA airport code, also known as an IATA location identifier, IATA station code, or simply a location identifier, is a three-character alphanumeric geocode designating many airports and metropolitan areas around the world, defined by the ...

for Örnsköldsvik Airport in Örnsköldsvik, Sweden * Open educational resources, open documents that are useful for teaching, learning, educational, assessment and research purposes. * Offense efficiency rating, the average number of points scored per shot by a basketball player. *

Oregon Electric Railway The Oregon Electric Railway (OE) was an interurban railroad line in the U.S. state of Oregon that linked Portland to Eugene. Service from Portland to Salem began in January 1908. The Spokane, Portland and Seattle Railway purchased the system in ...

, an interurban railroad line in Oregon, United States. * Odakyu Electric Railway, a Japanese railway company. *

Oxygen enhancement ratio The oxygen enhancement ratio (OER) or oxygen enhancement effect in radiobiology refers to the enhancement of therapeutic or detrimental effect of ionizing radiation due to the presence of oxygen. This so-called oxygen effect is most notable when ce ...

, effect magnitude of ionizing radiation due to the presence of oxygen. * Oxygen Evolution Reaction, the formation of oxygen by electrochemical reduction of water. * Officer Evaluation Report, an evaluation form used by the United States Army.

See also