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Oheka Castle
Oheka Castle, named for Otto HErmann KAhn, is a French-style chateau in Cold Spring Harbor, Huntington, New York, built by the financier between 1914 and 1919.
Ohgishima LNG Terminal
Ohgishima LNG Terminal is a liquefied natural gas terminal operated by Tokyo Gas on reclaimed Ohgishima island in Yokohama, Japan, supplying city gas to the Tokyo area.
Ohgishima power station
Ohgishima power station is a natural gas-fired power plant in Ohgishima, Tsurumi-ku, Yokohama, Japan, operated by Ohgishima Power Co., Ltd. and generating about 1,220 MW from three gas turbine combined cycle units.
Ohio and Erie Canal
The Ohio and Erie Canal was a 308-mile waterway built by Ohio from 1825 to 1832, connecting Lake Erie at Cleveland with the Ohio River at Portsmouth.
Ohio Department of Transportation
The Ohio Department of Transportation (ODOT) is the state agency that builds, maintains, and operates Ohio's highways, established in 1904 as the Ohio Department of Highways.
Ohio Edison
Ohio Edison Company is an Akron, Ohio-based electric distribution utility serving about 1.1 million customers in central and northeastern Ohio, a founding member of FirstEnergy since 1997.
Ohio River locks and dams
The Ohio River locks and dams are a chain of 19 navigation structures operated by the U.S. Army Corps of Engineers along 981 miles from Pittsburgh to Cairo, Illinois.
Ohio Statehouse
The Ohio Statehouse is the state capitol of Ohio on Capitol Square in Columbus, housing the General Assembly and governor's office in a Greek Revival building completed in 1861.
Ohio Turnpike
The Ohio Turnpike, officially the James W. Shocknessy Ohio Turnpike, is a 241-mile toll road across northern Ohio carrying Interstates 80, 90, and 76. It opened in 1955 and avoids Ohio's major cities.
Ohio-class submarine
The Ohio class is a class of 18 nuclear-powered ballistic-missile submarines built for the United States Navy by General Dynamics Electric Boat; 14 carry Trident II D5 missiles and four became guided-missile submarines.
OHL (company)
OHL (Obrascón Huarte Lain, S.A.), known since 2021 as OHLA, is a Spanish construction and infrastructure group based in Madrid, tracing its origins to a Bilbao firm founded in 1911.
OHSAS 18001
OHSAS 18001 was a specification standard for occupational health and safety management systems, first published in 1999 and withdrawn in 2021 after replacement by ISO 45001.
Ōi Nuclear Power Plant
The Ōi Nuclear Power Plant (大飯発電所) is a nuclear power station in Ōi, Fukui Prefecture, Japan, owned and operated by the Kansai Electric Power Company.
Oil & Gas Development Company
Oil & Gas Development Company Limited (OGDCL) is Pakistan's largest state-owned exploration and production company, established in 1961 and producing about 49% of national oil output.
Oil analysis
Oil analysis, also called used-oil analysis or oil condition monitoring, is the laboratory testing of lubricant from operating machinery to detect wear, contamination, and degraded oil.
Oil and Gas Development Company
Oil and Gas Development Company Limited (OGDCL) is Pakistan's state-controlled oil and gas exploration and production company, headquartered in Islamabad, holding the largest share of the country's reserves and output.
Oil and gas industry in Ghana
The oil and gas industry in Ghana is an offshore petroleum sector producing from the Jubilee, TEN, and Sankofa-Gye Nyame fields, with output peaking in 2019.
Oil and gas industry in India
The oil and gas industry in India, also called the petroleum industry in India, spans exploration, refining, and marketing, with about 88 percent of crude oil imported.
Oil and Natural Gas Corporation (तेल एवं प्राकृतिक गैस निगम)
Oil and Natural Gas Corporation (तेल एवं प्राकृतिक गैस निगम), known as ONGC, is an Indian state-owned oil and gas company headquartered in New Delhi, producing about 71 percent of India's domestic oil and gas.
Oil circuit breaker
An oil circuit breaker is a power circuit breaker that quenches the arc by separating contacts in insulating oil, dominating high-voltage switchgear for most of the twentieth century.
Oil distillation
Oil distillation is the process that heats crude oil and condenses its vapor fractions at different boiling ranges; its crude unit is the first in virtually all refineries.
Oil heater
Oil heater (oil-filled radiator, オイルヒーター): portable electric space heater warming a room via factory-sealed diathermic oil heated by an element, never burned; distinct from Japanese kerosene oil heaters (石油ヒーター) and oil-fired boilers; ~1.62 kWh/h measured running cost.
Oil hydrogenation
Oil hydrogenation is a catalytic process that adds hydrogen to unsaturated fatty acids in edible oils, converting liquid oils into solid fats for margarine, shortening, and bakery products.
Oil in Kenya
Oil in Kenya refers to the country's petroleum resources, first discovered commercially at Ngamia-1 in the South Lokichar Basin, Turkana County, in 2012, with production planned from 2026.
Oil India
Oil India Limited is an Indian state-owned oil and gas exploration and production company headquartered at Duliajan in Assam, incorporated in 1959 to develop the Naharkatiya oilfields.
Oil lamp
An oil lamp, also called an oil lantern, is a device that burns oil through a wick to produce light, used widely until electricity spread in the late 19th century.
Oil platform
An oil platform, also called an offshore platform, is a structure on the seabed that drills wells and extracts petroleum and natural gas from beneath the ocean floor.
Oil refinery
An oil refinery, also called a petroleum refinery, is an industrial facility that converts crude oil into products like gasoline, diesel, jet fuel, and asphalt through separation, conversion, and treatment.
Oil reserves in Saudi Arabia
Oil reserves in Saudi Arabia, also called Saudi oil reserves, are estimated at about 267 billion barrels of proven crude oil, roughly 17 percent of the world's reserves.
Oil reserves in Venezuela
The oil reserves in Venezuela, also called Venezuelan oil reserves, are the world's largest proven crude reserves at about 303 billion barrels, mostly extra-heavy oil in the Orinoco Belt.