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Origins and architecture of the Taj Mahal
The Origins and architecture of the Taj Mahal, also called Architecture of the Taj Mahal, describes the mausoleum Shah Jahan built at Agra for Mumtaz Mahal, completed in 1648.
OriHime
OriHime is a telepresence, or avatar, robot developed by OryLab in Japan, which a remote operator speaks and moves through to attend work, school, or cafés.
ORiN
ORiN (Open Resource Interface for the Network) is a middleware specification giving software a standard interface to factory automation equipment like industrial robots and PLCs.
Orinoco Belt
The Orinoco Belt, Spanish Faja Petrolífera del Orinoco, is a huge deposit of heavy and extra-heavy crude oil north of Venezuela's Orinoco River, the largest known hydrocarbon accumulation.
Oriol Vinyals
Oriol Vinyals is a Spanish machine learning researcher known for sequence-to-sequence learning and leading AlphaStar, and a former Google DeepMind VP who co-founded Discovery Loop in 2026.
Orion (spacecraft)
Orion is NASA's deep-space crewed spacecraft, built by Lockheed Martin, carrying four astronauts to the Moon on Artemis missions; its first crewed flight, Artemis II, flew around the Moon in 2026.
OrionStar
OrionStar (猎户星空) is a Chinese artificial intelligence and service robotics company founded in September 2016 by Fu Sheng under Cheetah Mobile, focused on voice-interaction robots for restaurants, hotels, and retail.
Orkut
Orkut was a social networking website run by Google from 2004 until 2014, named after its creator Orkut Büyükkökten and dominant in Brazil and India.
Orlando International Airport
Orlando International Airport (MCO) is a major airport in Orlando, Florida, built on the former McCoy Air Force Base and serving Central Florida's theme-park tourism region.
Orlando J. Rojas
Orlando J. Rojas is a materials scientist working on nanocellulose and bio-based materials, Canada Excellence Research Chair at the University of British Columbia and winner of the Anselme Payen Award.
Orlando Sanford International Airport
Orlando Sanford International Airport is a public airport in Sanford, Florida, 16 miles northeast of Orlando, serving as the Orlando area's secondary airport, dominated by Allegiant and low-cost carriers.
Orlando Utilities Commission
The Orlando Utilities Commission (OUC) is a municipally owned electric and water utility serving Orlando and St. Cloud, Florida, created by the state legislature in 1923.
Orlin D. Velev
Orlin D. Velev is a chemical engineer and colloid scientist, the Culberson Distinguished Professor at North Carolina State University since 2001, known for directed colloidal assembly and droplet microfluidics.
Orly Air Base
Orly Air Base was the United States Air Force designation for its facilities at Paris-Orly Airport south of Paris, occupied by American forces from 1944 to 1967.
Orly Airport
Orly Airport, known in French as Aéroport de Paris-Orly, is France's second-largest airport, about 14 km south of Paris, handling roughly 35 million passengers in 2025.
Ormat Technologies
Ormat Technologies, founded in Israel in 1965 and headquartered in Reno, Nevada, develops, builds, owns, and operates geothermal, recovered energy, solar, and energy storage power plants and manufactures their equipment.
Ormen Lange
Ormen Lange is a gas field in the southern Norwegian Sea, discovered in 1997 and producing since 2007; it is Norway's second-largest gas field, developed entirely with subsea equipment.
Ormond Beach power station
Ormond Beach power station is a two-unit natural gas-fired power plant on the coast of Oxnard, California, with both units online since 1971 and a combined capacity of 1,491 MW.
Ormonde Wind Farm
Ormonde Wind Farm is a 150 MW offshore wind farm in the Irish Sea about 10 km off Barrow-in-Furness, England, with 30 five-megawatt turbines fully operational since February 2012.
Ornithopter
An ornithopter is an aircraft that generates both lift and thrust by flapping its wings like a bird or insect, spanning rubber-powered toys, micro drones, and research robots.
Orocos
Orocos (Open RObot COntrol Software) is an open-source C++ project for real-time, component-based robot control software, started in 2001 as an EU-sponsored project; its core is the Real-Time Toolkit.
Orocual Oil Field
Orocual is an oil and gas field in northern Monagas state, eastern Venezuela, about 20 km northwest of Maturín, producing light oil and condensate since its 1933 discovery.
Orot Rabin power station
Orot Rabin (אורות רבין) is a power station on the Mediterranean coast at Hadera, Israel, owned by the Israel Electric Corporation and converting from coal to natural gas.
Oroville Dam
Oroville Dam is an earthfill dam on the Feather River in Butte County, California. At 770 feet (235 m) high, it is the tallest dam in the United States.
Oroville Dam crisis
The Oroville Dam crisis was a February 2017 emergency at Oroville Dam on the Feather River in California, in which spillway failures prompted the evacuation of about 188,000 people.
Orqa
Orqa, legally ORQA d.o.o., is a Croatian technology company founded in Osijek in late 2018 that designs FPV drones and video goggles, producing up to 280,000 NDAA-compliant drones yearly.
Orteig Prize
The Orteig Prize was a $25,000 inducement prize offered in 1919 by New York hotelier Raymond Orteig for the first nonstop flight between New York and Paris, in either direction.
Ortho-para hydrogen conversion
Ortho-para hydrogen conversion is the interconversion between hydrogen's two nuclear-spin isomers, ortho- and para-hydrogen, and matters when hydrogen is liquefied near 20 K, since unconverted ortho-hydrogen releases heat that boils off stored liquid.
Orthoglide
The Orthoglide is a three-degree-of-freedom translational parallel manipulator with three orthogonal linear joints and a mobile platform of fixed orientation, designed at IRCCyN in Nantes, France, beginning in 2001 for rapid machining.
Orthogonal frequency-division multiple access
Orthogonal frequency-division multiple access (OFDMA) is a multicarrier scheme that assigns groups of subcarriers to different users, serving as the LTE downlink and a defining feature of Wi-Fi 6.