OEC may refer to:

Finance

The Observatory of Economic Complexity The Observatory of Economic Complexity (OEC) is a data visualization site for international trade data created by the Macro Connections group at the MIT Media Lab. The goal of the observatory is to distribute international trade data in a visual ...

, a data visualization site * Ordre des Experts-Comptables, French association of chartered accountants

Transportation

* Orion Expedition Cruises, Australian based luxury expedition cruise line *

Otis Elevator Company Otis Worldwide Corporation ( branded as the Otis Elevator Company, its former legal name) is an American company that develops, manufactures and markets elevators, escalators, moving walkways, and related equipment. Based in Farmington, Connec ...

, an American company that manufactures vertical transportation systems *

Osborn Engineering Company Osborn Engineering Company was a British manufacturer of motorcycles, which sold its machines under the OEC brand name. The Osborn Engineering Company and its predecessor companies were founded by Frederick John Osborn, trading in partnership w ...

, known as OEC, an historic British former manufacturer of motorcycles

Other

Offshore Energy Center The Ocean Star Offshore Drilling Rig & Museum, located in Galveston, Texas, is a museum dedicated to the offshore oil and gas industry. Located next to the Strand National Historic Landmark District, the museum is housed on a retired jack-up ri ...

, sponsor of the Ocean Star Offshore Drilling Rig & Museum in Galveston, Texas, United States *

Old Earth creationism Old Earth creationism (OEC) is an umbrella of theological views encompassing certain varieties of creationism which may or can include day-age creationism, gap creationism, progressive creationism, and sometimes theistic evolutionism. Broadly ...

, a term for several types of creationism *

Olfactory ensheathing cells Olfactory ensheathing cells (OECs), also known as olfactory ensheathing glia or olfactory ensheathing glial cells, are a type of macroglia ( radial glia) found in the nervous system. They are also known as olfactory Schwann cells, because they en ...

, a type of glial cell found in the nervous system *

Oregon Environmental Council The Oregon Environmental Council (OEC) is an environmental advocacy group based in Portland, Oregon, United States. It was founded in 1968. History The Oregon Environmental Council was founded in 1968 by a group of "ordinary citizens", including ...

, an American environmental organization *

Orissa Engineering College Orissa Engineering College, Bhubaneswar is a First private engineering college established in Odisha. It was set up in 1986. Orissa Engineering College is the Odisha Electronics Control Library result of the vision of Shri Kamini Kanta Patnai ...

, a technical institution in Bhubaneswar, Orissa, India * Outdoor Emergency Care, a course for certification of first aid in non-urban situations *

Oxford English Corpus The Oxford English Corpus (OEC) is a text corpus of 21st-century English, used by the makers of the ''Oxford English Dictionary'' and by Oxford University Press' language research programme. It is the largest corpus of its kind, containing nearly ...

, an English text corpus *

Oxygen evolving complex The oxygen-evolving complex (OEC), also known as the water-splitting complex, is the portion of photosystem II where photo-oxidation of water occurs during the light reactions of photosynthesis. The OEC is surrounded by four core protein subunits ...

, a water oxidizing enzyme * .OEC, the file format for OE-Cake!, a fluid physics software application {{disambig