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 A suite, in Western classical music and jazz, 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 to comprise up to five dances, sometimes with ...

, French association of chartered accountants

Transportation

Orion Expedition Cruises Orion Expedition Cruises (OEC) is a former Australian-based luxury expedition cruise line that operated the German-built 103 m, 4000 gross tonne in Australasian and Antarctic waters. History Founded by Australian businesswoman Sarina Bratto ...

, Australian based luxury expedition cruise line *

Otis Elevator Company Otis Worldwide Corporation (trade name, 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 Farming ...

, 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, sponsor of the Ocean Star Offshore Drilling Rig & Museum in Galveston, Texas, United States * Old Earth creationism, a term for several types of creationism * Olfactory ensheathing cells, 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 Patnaik ...

, a technical institution in Bhubaneswar, Orissa, India * Outdoor Emergency Care, a course for certification of first aid in non-urban situations * Oxford English Corpus, an English text corpus * Oxygen evolving complex, a water oxidizing enzyme * .OEC, the file format for OE-Cake!, a fluid physics software application {{disambig