OEC may refer to:

Finance

The Observatory of Economic Complexity The Observatory of Economic Complexity (OEC) is an online data visualization and distribution platform for international trade data designed and owned bDatawheel Through interactive visualizations, the OEC aims to make global trade data accessib ...

, a data visualization site *

Ordre des Experts-Comptables A suite, in Western classical music, is an ordered set of instrumental or orchestral/concert band pieces. It originated in the late 14th century as a pairing of dance tunes; and grew in scope so that by the early 17th century it comprised up to f ...

, French association of chartered accountants

Transportation

Orion Expedition Cruises Orion Expedition Cruises (OEC) was an Australia-based luxury expedition cruise line that operated the German-built 4,000-gross ton cruise ship in Australasian and Antarctic waters. History Founded by Australian businesswoman Sarina Bratton ...

, Australian based luxury expedition cruise line *

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

, 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 * OEConnection, an American company that provides B2B solutions, connecting Automotive Manufacturers, Dealers and Collision & Repair shops

Other

* Odd Eye Circle, a South Korean girl group * Offshore Energy Center, 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 evolution. Broadly speak ...

, 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 e ...

, a type of glial cell found in the nervous system * Oregon Environmental Council, 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 * Overseas Employment Certificate, an identity document in the Philippines *

Oxford English Corpus The Oxford English Corpus (OEC) is a text corpus of 21st-century English language, 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, ...

, an English text corpus *

Oxygen evolving complex The oxygen-evolving complex (OEC), also known as the water-splitting complex, is a water-oxidizing enzyme involved in the photo-oxidation of water during the light reactions of photosynthesis. OEC is surrounded by 4 core proteins of photosystem ...

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