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Labelbox
Labelbox is a San Francisco company founded in 2018 that supplies training and post-training data for machine learning, combining a data-labeling platform with expert human evaluation services.
Labeled Faces in the Wild
Labeled Faces in the Wild (LFW) is a public database of 13,233 labeled face photographs of 5,749 people, published in 2007 by University of Massachusetts researchers for face recognition research.
LabelMe
LabelMe is an MIT web tool and database for annotating objects in images for recognition research, and an open-source Python desktop application, inspired by it, for building training datasets.
Labor history of postal and telecommunications services
The labor history of postal and telecommunications services traces how mail, telegraph, and telephone workers organized into unions, from British Post Office meetings in the 1840s onward.
Labrador Iron Ore Royalty Corporation
Labrador Iron Ore Royalty Corporation is a Canadian royalty company on the Iron Ore Company of Canada, holding a 7% royalty and 15.10% equity stake.
Labrang Monastery
Labrang Monastery (拉卜楞寺) is a Tibetan Buddhist Gelug monastery in Xiahe County, Gansu, China, founded in 1709 and counted among the six most important Gelug monasteries.
LabVIEW
LabVIEW (Laboratory Virtual Instrument Engineering Workbench) is a graphical programming environment and language, called G, developed by National Instruments in 1986 for building test, measurement, and control applications.
Labyrinth seal
A labyrinth seal is a non-contacting mechanical seal that limits fluid leakage between rotating and stationary parts by forcing flow through fins and cavities, common in turbines and compressors.
Labyrinth spillway
A labyrinth spillway is an overflow weir folded into a zigzag or arced shape, giving roughly twice the discharge of a straight weir of the same width.
Lac de Serre-Ponçon
Lac de Serre-Ponçon is a large artificial reservoir in the French Alps, built by EDF between 1955 and 1961 and the largest artificial lake in France.
Lac-Mégantic rail accident
The Lac-Mégantic rail accident was a 2013 disaster in Quebec, when an unattended Montreal, Maine & Atlantic freight train carrying crude oil rolled downhill, derailed, and killed 47 people.
Lac-Mégantic rail disaster
The Lac-Mégantic rail disaster, also called the Lac-Mégantic derailment, was a runaway freight train carrying crude oil that derailed, burned, and exploded in Lac-Mégantic, Quebec, on 6 July 2013, killing 47 people.
Lachy Groom
Lachy Groom (born 1994) is an Australian entrepreneur and angel investor who joined Stripe as its 30th employee, led Stripe Issuing, and backed startups including Figma and Notion.
Lack of fusion
Lack of fusion (LOF) is a welding imperfection in which the weld metal fails to fuse to the joint face, base metal, or an adjoining bead, leaving a planar flaw.
Lackawanna energy center
The Lackawanna Energy Center is a 1,500 MW natural gas-fired combined-cycle power station in Jessup, Pennsylvania, opened in 2019 and operated by Invenergy, selling power into the PJM Interconnection.
Lackland Air Force Base
Lackland Air Force Base is a US Air Force base in San Antonio, Texas, known as the Gateway to the Air Force, where all enlisted recruits begin basic training.
Lacq–Larrau Gas Pipeline
The Lacq–Larrau Gas Pipeline is a natural gas pipeline linking France's Lacq gas field to the Spanish network at the Puerto de Larrau pass, commissioned in 1993.
Lacrosse (satellite)
Lacrosse, also known as Onyx, was a series of five synthetic aperture radar reconnaissance satellites flown by the US National Reconnaissance Office between 1988 and 2005.
Lada (Лада)
Lada (Лада) is the passenger-car brand of the Russian manufacturer AvtoVAZ, produced principally in Togliatti. Its first model launched in 1970, and it remains Russia's best-selling car brand.
Lada Aura (Лада Аура)
Lada Aura (Лада Аура) is a business-class sedan made by the Russian automaker AvtoVAZ, a Lada Vesta stretched by 250 mm to add rear-passenger space, produced from 2024.
Lada Azimut
The Lada Azimut is a compact front-wheel-drive crossover produced by Russian automaker AvtoVAZ at its Tolyatti plant, unveiled in 2025 and entering production in September 2026.
Lada Iskra (Лада Искра)
The Lada Iskra (Лада Искра) is a compact car family produced by AvtoVAZ in Russia since 2025, offered as a sedan, a wagon, and a cross-country wagon.
Lada Kalina (Лада Калина)
The Lada Kalina (Лада Калина) is a small front-wheel-drive car built by AvtoVAZ in Togliatti, Russia, from 2004 to 2018 in sedan, hatchback, and wagon versions.
Lada Niva
The Lada Niva, also known as the Lada 4x4, is a compact four-wheel-drive off-road vehicle built by AvtoVAZ in Tolyatti, Russia, since 1977, with over 2.5 million made.
Lada Riva
The Lada Riva, sold as the Lada Nova and Signet in other markets, is the export name for the VAZ-2105, 2104, and 2107, built by AvtoVAZ from 1979 to 2012.
Lada Samara (Лада Самара)
Lada Samara (Лада Самара), sold at home as the Lada Sputnik, is a family of small front-wheel-drive cars built by AvtoVAZ in Tolyatti, Russia, from 1984 to 2013.
Lada Vesta (Лада Веста)
Lada Vesta (Лада Веста) is a compact car made by Russian manufacturer AvtoVAZ since 2015, the successor to the LADA Priora and one of Russia's two best-selling cars.
Lada-class submarine
The Lada-class submarine (Project 677, Russian: Лада) is a Russian fourth-generation diesel-electric attack submarine designed by Rubin and built at Admiralty Shipyards to replace the Kilo class.
Ladbroke Grove rail crash
The Ladbroke Grove rail crash, also known as the Paddington rail crash, was a 1999 head-on collision between two passenger trains near Paddington station in London that killed 31 people.
Ladder
A ladder is a portable or fixed structure of rails joined by rungs for climbing between levels, with step ladders that self-support and extension ladders that lean.