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Main Outfall Drain
The Main Outfall Drain, also called the Third River, is a 565 km drainage canal in Iraq, completed in 1992 to carry saline water to the Arabian Gulf.
Main Roads Western Australia
Main Roads Western Australia, or Main Roads WA, is the statutory authority of the Government of Western Australia responsible for planning, building, and maintaining the state's roads.
Main Street (Hamilton, Ontario)
Main Street in Hamilton, Ontario, is the address of Bell Canada's principal telephone exchange buildings, on the site of the British Empire's first telephone exchange of 1878.
Main Town Hall in Gdańsk
The Main Town Hall in Gdańsk (Ratusz Głównego Miasta) is a Gothic and Renaissance building that served as the city government seat until 1921 and houses the Museum of Gdańsk.
Maine Department of Transportation
The Maine Department of Transportation, or MaineDOT, is a cabinet-level state agency responsible for transportation across Maine, established in 1972 and covering highways, bridges, rail, ports, aviation, transit, and ferries.
Maine Maritime Academy
Maine Maritime Academy is a public maritime college in Castine, Maine, founded in 1941, offering degrees in engineering, marine sciences, and transportation, with training aboard the ship State of Maine.
Maine Yankee Atomic Power Plant
Maine Yankee Atomic Power Plant was a pressurized water reactor in Wiscasset, Maine, that generated electricity from 1972 to 1997 and completed decommissioning in 2005.
Mainframe computer
A mainframe computer, or mainframe, is a large, high-reliability computer serving as an organization's central data-processing system, still widely used in banking, insurance, and government.
Mains electricity
Mains electricity, also called mains power or household power, is the general-purpose alternating-current supply delivered by public utility networks to buildings through wall outlets, as distinct from battery power.
Mains electricity by country
Mains electricity by country covers the domestic voltage, frequency, and plug standards each country uses, with most supplying 220 to 240 volts and about 15 plug types worldwide.
Mainspring
A mainspring, also called a motor spring or watchspring, is a coiled steel spring that stores energy to drive the gear train of a mechanical clock or watch.
Mainspring Energy
Mainspring Energy, formerly EtaGen and Affinity Power, is a Menlo Park, California clean-power company founded in 2010 that builds fuel-flexible linear generators for onsite electricity production.
Maintainability index
The maintainability index is a composite software metric combining size, complexity, and documentation measures into a single number, proposed by Oman and Hagemeister in 1992.
Maintainer (software)
A maintainer in software is a person responsible for a piece of software or subsystem, reviewing and accepting changes, deciding releases, and keeping the code and community healthy.
Mainz Cathedral
Mainz Cathedral, known in German as Mainzer Dom, is the Roman Catholic cathedral of Mainz, Germany, founded by Archbishop Willigis in 975 and the site of seven royal coronations.
Maisto
Maisto is a die-cast model vehicle brand registered in 1990 by Hong Kong's May Cheong Group, known for scale cars and motorcycles and an early 1:18 scale line.
Maithilee Kunda
Maithilee Kunda is an American cognitive scientist and AI researcher studying visual thinking in autism and neurodiversity, a reader at the University of Edinburgh and 2025 PECASE recipient.
Maithon Dam (मैथन बांध)
Maithon Dam (मैथन बांध) is a multipurpose dam on the Barakar River in Jharkhand, India, completed in 1957 and operated by the Damodar Valley Corporation for flood control, irrigation, and hydropower.
Maithon Right Bank Thermal Power Station
Maithon Right Bank Thermal Power Station is a 1,050 MW coal-fired power station at Maithon in Jharkhand, India, owned by Tata Power and Damodar Valley Corporation.
Maitian Energy
Maitian Energy, also known as Fox ESS, is a Chinese manufacturer of residential energy storage systems and inverters, founded in 2019 in Wenzhou with backing from Tsingshan Holding Group.
Maizuru power station
Maizuru Power Station (舞鶴発電所) is a coal-fired power station in Maizuru, Kyoto Prefecture, Japan, operated by Kansai Electric, with two 900 MW units totaling 1.8 GW that began service in 2004 and 2010.
Maja Pantić
Maja Pantić, also written Maja Pantic, is a computer scientist and professor of affective and behavioral computing at Imperial College London, known for machine analysis of facial expressions and social signals.
Majestic Princess
Majestic Princess is a Royal-class cruise ship operated by Princess Cruises, built in Italy and delivered in 2017 as the first ship purpose-designed for the Chinese market.
Majialiang Coal Mine
Majialiang Coal Mine (麻家梁煤矿) is a large underground coal mine in Shuozhou, Shanxi, China, owned by Datong Coal Mine Group and producing about 12 million tonnes a year.
Majiliang Coal Mine
Majiliang Coal Mine (马脊梁矿) is an underground coal mine at Majiliang in Datong, Shanxi, China, operated by Jinneng Coal Mine Group and producing bituminous thermal coal since 1952.
Majnoon Field
Majnoon (مجنون) is a giant onshore oil field in Basra Governorate, southern Iraq, near the Iranian border, with estimated reserves of over 38 billion barrels.
Majolica
Majolica, also spelled maiolica, is tin-glazed earthenware with an opaque white tin-oxide glaze, painted with colored pigments before firing; related wares include delftware and faience.
Majorana 1
Majorana 1 is a quantum processing chip that Microsoft announced in February 2025, saying it holds eight topological qubits and is designed to scale to one million.
Majority voting
Majority voting is a fault-tolerance technique in which three or more redundant units perform the same computation, and a voter outputs the value most of them agree on, masking any faulty minority.
Majuba power station
Majuba power station is a coal-fired power station owned by Eskom in Mpumalanga, South Africa. With six units and 4,110 MW capacity, it is Eskom's second largest plant.