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Technology and the built world

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Oil Rocks Oil Field

Oil Rocks (Neft Daşları) is an offshore oil field and settlement in the Azerbaijani sector of the Caspian Sea, where the world's first offshore well was drilled in 1949.

Oil separator

An oil separator, also called a lubricant separator, is a pressure vessel in a refrigeration compressor's discharge line that removes entrained oil and returns it to the crankcase.

Oil spill

An oil spill, also called an oil slick, is the release of liquid petroleum into the environment, most often the ocean, from tankers, pipelines, offshore drilling, or natural seeps.

Oil tanker

The oil tanker, or petroleum tanker, is a merchant ship that carries products in bulk and, as of 2023, comprised nearly 36.9% of the entire global fleet.

Oil well

An oil well is a hole drilled into the earth to find or produce crude oil or natural gas, passing from drilling through casing, completion, and production to plugging.

Oil-based mud

Oil-based mud is a drilling fluid with oil as the continuous phase and brine emulsified as droplets, used in rotary drilling for shale stability, lubricity, and high-temperature wells.

Oil-filled cable

An oil-filled cable is a high-voltage power cable in which paper insulation is impregnated with oil kept under continuous pressure, as self-contained or pipe-type designs.

Oil-filled transformer

An oil-filled transformer, also called an oil-immersed transformer, is an electrical transformer with its core and windings submerged in insulating oil that both insulates and cools.

Oil-indexed pricing

Oil-indexed pricing sets the price of natural gas, especially LNG, as a formula tied to crude oil prices, and remains the traditional basis for long-term LNG contracts in Asia.

Oil-well cement

Oil-well cement is a Portland cement specified under API standards to seal the space between well casing and borehole, providing zonal isolation in oil, gas, and geothermal wells.

Oil–water separation membrane

An oil–water separation membrane is a porous, pressure-driven barrier that passes one phase of an oil–water mixture while rejecting the other, cleaning oily industrial wastewater or recovering oil.

Oiltanking

Oiltanking is a German tank storage company, a subsidiary of Marquard & Bahls, operating 64 terminals in 24 countries for crude oil, petroleum products, and chemicals.

Oita LNG Terminal

The Oita LNG Terminal (大分LNG基地) is a liquefied natural gas import terminal at the Port of Oita in Oita Prefecture, Kyushu, Japan, operating since 1990.

Oita Petrochemical Complex

The Oita Petrochemical Complex (大分石油化学コンビナート) is a petrochemical manufacturing complex in Oita City, Japan, with Kyushu's only ethylene plant, operated by Crasus Chemical since 1969.

Ojinaga-El Encino Gas Pipeline

The Ojinaga-El Encino Gas Pipeline (Gasoducto Ojinaga-El Encino) is a 42-inch natural gas pipeline carrying gas from Ojinaga on the Texas border to El Encino, Chihuahua, Mexico.

OK Soda

OK Soda, also known as Okay Soda, was a fruit-flavored soft drink created by Coca-Cola in 1993 to target Generation X through ironic anti-marketing, and discontinued in 1995.

Okamoto Machine Tool Works

Okamoto Machine Tool Works is a Japanese manufacturer of grinding machines and semiconductor equipment, founded by Kakusaburou Okamoto in 1926 and known for Japan's first gear and surface grinding machines.

Okamura Corporation

Okamura Corporation is a Japanese manufacturer of office furniture, store display fixtures, and material handling systems, headquartered in Yokohama and listed on the Tokyo Stock Exchange since 1961.

Okapi BM25

Okapi BM25, often shortened to BM25, is a ranking function that scores how well a document matches a query, and is the default in Elasticsearch and Lucene.

Okarem-Beyneu Gas Pipeline

The Okarem-Beyneu Gas Pipeline (Russian: Газопровод Окарем-Бейнеу) is a natural gas pipeline from Okarem, Turkmenistan, to Beyneu, Kazakhstan, built in the 1970s to carry Soviet gas westward.

OkCupid

OkCupid, formerly SparkMatch, is a dating website and mobile app launched in 2004 by four Harvard students, matching users through compatibility percentages from thousands of answered questions.

Okeechobee Clean energy center

The Okeechobee Clean Energy Center (OCEC) is a 1,723 MW natural gas-fired combined-cycle power plant in Okeechobee County, Florida, operated by Florida Power & Light since 2019.

Okinawa Electric Power Company

The Okinawa Electric Power Company, Incorporated (沖縄電力, OEPC) is the vertically integrated electric utility serving Japan's Okinawa Prefecture, founded in 1972 and privatized in 1988. Its isolated grid runs mainly on coal, LNG, and oil.

Oklab color space

Oklab (OKLab) is a perceptual color space designed by Björn Ottosson and introduced in 2020, predicting lightness, chroma, and hue better than CIELAB while remaining simple to compute.

Oklahoma Department of Transportation

The Oklahoma Department of Transportation (ODOT) is the state agency responsible for planning, building, and maintaining Oklahoma's state highways, founded in 1911 as the Oklahoma Department of Highways.

Oklo Inc.

Oklo Inc. is an American advanced nuclear technology company, founded in 2013, developing the Aurora fast reactor, a 15 to 75 MWe powerhouse, and nuclear fuel recycling.

Okmetic

Okmetic Oyj is a Finnish manufacturer of advanced, customized 150–200 mm silicon wafers for MEMS, sensor, radio frequency, and power devices, founded in 1985 and owned by China's NSIG since 2016.

Oko (Око) (satellite programme)

Oko (Око) was a Soviet and Russian missile early-warning satellite system that detected US ICBM launches by infrared sensing, operating from 1978 until its replacement after 2012.

Okpai Oil and Gas Field

The Okpai Oil and Gas Field is an onshore oil and gas field in Nigeria's Niger Delta, best known for hosting Nigeria's first oil-company-built independent power plant.

Okuma Corporation

Okuma Corporation (オークマ株式会社) is a Japanese manufacturer of CNC machine tools and CNC controls, founded in 1898 as a maker of noodle machines and known for building its own OSP controls.