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Old Stock Exchange, Copenhagen
The Old Stock Exchange (Børsen) is a 17th-century Dutch Renaissance building on Slotsholmen in Copenhagen, built for King Christian IV and known for its dragon-tail spire.
Old Stone Church
The Old Stone Church is the historic First Presbyterian Church in Cleveland, Ohio, whose 1855 Romanesque Revival building is the oldest surviving building on Public Square.
Old Summer Palace
The Old Summer Palace, known in Chinese as Yuanmingyuan, was the Qing dynasty's principal imperial garden-palace compound in northwest Beijing, looted and burned by Anglo-French troops in October 1860.
Old Trafford
Old Trafford, known as the Theatre of Dreams, is a football stadium in Manchester, England, and home of Manchester United since its opening in 1910.
Old Vinyl Factory
The Old Vinyl Factory is a redevelopment in Hayes, London, on the site of the Gramophone Company's 1907 record factory, later EMI's principal vinyl pressing plant.
Oldelval Oil Pipeline
Oldelval (Oleoductos del Valle S.A.) is an Argentine pipeline company operating the country's largest oil pipeline system, carrying Neuquén Basin crude, including Vaca Muerta shale oil, to the Atlantic port of Puerto Rosales.
Oldsmobile
Oldsmobile, founded by Ransom E. Olds in Lansing, Michigan in 1897, was a General Motors division and the oldest American automobile marque, discontinued in 2004.
Oldsmobile 442
The Oldsmobile 442 was an American muscle car option package and, from 1968 to 1971, a standalone model built by Oldsmobile from 1964 to 1991.
Oldsmobile 88
The Oldsmobile 88, also sold as the Eighty-Eight, was a full-size Oldsmobile car sold from 1949 to 1999, famous for its high-compression Rocket V8 engine and racing wins.
Oldsmobile 98
The Oldsmobile 98, often styled Ninety-Eight, was Oldsmobile's full-size flagship car from 1940 to 1996, sold above the Delta 88 as a luxury alternative to Cadillac at a lower price.
Oldsmobile Alero
The Oldsmobile Alero was a compact coupe and sedan built by General Motors' Oldsmobile division from 1999 to 2004, replacing the Achieva and ending the brand's history.
Oldsmobile Aurora
The Oldsmobile Aurora is a front-wheel-drive luxury sedan built by General Motors' Oldsmobile division, sold for 1995 to 1999 and 2001 to 2003 with no 2000 model.
Oldsmobile Bravada
The Oldsmobile Bravada was a mid-size luxury SUV produced by Oldsmobile from 1991 through 2004, sold as an upscale version of the Chevrolet Blazer and GMC Jimmy.
Oldsmobile Curved Dash
The Oldsmobile Curved Dash, also called the Curved Dash Olds, was a one-cylinder runabout built from 1901 to 1907 and regarded as the first mass-produced gasoline automobile.
Oldsmobile Cutlass
The Oldsmobile Cutlass was a range of mid-size automobiles built by General Motors' Oldsmobile division from 1961 to 1999, spanning models like the Cutlass Supreme and Cutlass Ciera and becoming America's best-selling car in 1976.
Oldsmobile Cutlass Ciera
The Oldsmobile Cutlass Ciera was a mid-size front-wheel-drive Oldsmobile built from 1982 to 1996, sharing GM's A-body platform with the Chevrolet Celebrity and Buick Century.
Oldsmobile Cutlass Supreme
The Oldsmobile Cutlass Supreme, also known as the Cutlass Supreme, is a mid-size Oldsmobile produced from 1966 to 1997, at its peak part of America's best-selling car.
Oldsmobile Firenza
The Oldsmobile Firenza was a front-wheel-drive compact car built by General Motors' Oldsmobile division from 1982 to 1988, as the marque's version of the J-body platform shared with the Chevrolet Cavalier.
Oldsmobile Silhouette
The Oldsmobile Silhouette was a luxury minivan produced by General Motors' Oldsmobile division from 1990 to 2004, known for its "Dustbuster" styling and its role in the 1995 film Get Shorty.
Oldsmobile Starfire
The Oldsmobile Starfire was a nameplate used by Oldsmobile in three eras: 1954–1956 Ninety-Eight convertibles, a full-size personal luxury car from 1961 to 1966, and a compact hatchback from 1975 to 1980.
Oldsmobile Toronado
The Oldsmobile Toronado was a personal luxury coupe sold by Oldsmobile from 1966 to 1992 and the first front-wheel-drive American production car since the 1937 Cord 810.
Oldsmobile V8 engine
The Oldsmobile V8 engine, known as the "Rocket" V8, is a family of gasoline V-8 engines built by GM's Oldsmobile division from 1949 to 1990, beginning with the 135 hp Rocket of 1949.
Oldsmobile Vista Cruiser
The Oldsmobile Vista Cruiser, or Vista Cruiser, is a station wagon Oldsmobile built from 1964 to 1977, best known for the glass skylights and raised roof of its first two generations.
Ole Kirk Christiansen
Ole Kirk Christiansen (1891–1958) was a Danish master carpenter and joiner who founded the LEGO Group in Billund, Denmark, in 1932, turning from wooden toys to plastic bricks.
Ole-Johan Dahl
Ole-Johan Dahl was a Norwegian computer scientist who, with Kristen Nygaard, created the Simula languages at the Norwegian Computing Center, introduced object-oriented programming, and won the 2001 Turing Award.
OLED
OLED, or organic light-emitting diode, is a device whose thin carbon-based layer emits light under current; each pixel generates its own light, enabling true black and flexible panels.
OLED encapsulation
OLED encapsulation is the set of materials and structures that seal an organic light-emitting diode (OLED) against water vapor, oxygen, heat, and mechanical stress, which rapidly degrade the device.
Olefin purification
Olefin purification is the separation of light olefins like ethylene and propylene from chemically similar paraffins and impurities, aiming to replace energy-intensive cryogenic distillation with selective MOF adsorbents.
Oleflex
Oleflex is a Honeywell UOP licensed catalytic dehydrogenation process converting propane into propylene over a moving-bed platinum catalyst, first commercialized at a Thai plant in 1990.
Oleg D. Sherby
Oleg D. Sherby (1925–2015) was an American materials scientist at Stanford University whose work linked high-temperature creep to self-diffusion, opened the study of superplasticity, and created ultrahigh carbon steels.