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Technology and the built world

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Kykuit

Kykuit (Dutch for "lookout") is the four-story Beaux-Arts Rockefeller family estate in Pocantico Hills, New York, built 1907–1913, a National Historic Landmark since 1976, now administered by the Rockefeller Brothers Fund.

Kylchap

The Kylchap is a multi-stage exhaust system for steam locomotives, developed by French engineer André Chapelon from Kyösti Kylälä's design, which improved draught while reducing cylinder back pressure.

Kyle T. Alfriend

Kyle T. (Terry) Alfriend is an American astrodynamics researcher and Regents Professor of aerospace engineering at Texas A&M University, known for orbital mechanics, spacecraft formation flying, and space situational awareness.

Kymco

Kymco, or Kwang Yang Motor Co., Ltd., is a Taiwanese maker of scooters, motorcycles, and ATVs headquartered in Kaohsiung, founded with Honda's help in the 1960s.

Kymeta

Kymeta Corporation is an American satellite-communications company founded in 2012 and headquartered in Redmond, Washington, making flat-panel antennas that steer the beam electronically without moving parts.

Kyndryl

Kyndryl is an American enterprise technology services provider created in 2021 from IBM's managed infrastructure services business, with about $15.1 billion in fiscal 2026 revenue.

Kyocera (京セラ株式会社)

Kyocera (京セラ), also known as Kyocera Corporation, is a diversified Japanese manufacturer founded in Kyoto in 1959 on fine ceramic technology, producing semiconductor parts, electronics, printers, and solar cells.

Kyoto University Research Reactor

The Kyoto University Research Reactor (KUR) was a 5 MW research reactor in Kumatori, Osaka, operated by Kyoto University from 1964 until 2026 for neutron experiments and isotope production.

Kyowa Electronic Instruments

Kyowa Electronic Instruments (共和電業) is a Japanese manufacturer of strain gages and force transducers, including six-axis sensors for robot arms, founded in Tokyo and known for commercializing Japan's first strain gage in 1951.

Kyowa Kirin

Kyowa Kirin Co., Ltd. (協和キリン) is a Japanese specialty pharmaceutical company headquartered in Tokyo and owned by Kirin Holdings. Formed by a 2008 merger, it makes Crysvita and Poteligeo.

Kyrgyzenergo

Kyrgyzenergo was the state-owned, vertically integrated electricity and heat monopoly of Kyrgyzstan until its restructuring in the early 2000s, which created the National Electric Grid of Kyrgyzstan and four regional distribution companies.

Kyrtaelskoe Oil Field

Kyrtaelskoe Oil Field (Кыртаельское, also spelled Kyrtayel) is an oil and gas condensate field in the Komi Republic, Russia, 15 km southwest of Pechora and discovered in 1969.

Kyu Tae Lee

Kyu Tae Lee (이규태) is a South Korean electrochemist and professor of chemical engineering at Seoul National University, known for research on lithium-ion and sodium-ion battery materials.

Kyu‐Jin Cho

Kyu-Jin Cho is a South Korean roboticist, professor of mechanical and aerospace engineering at Seoul National University, known for bioinspired microrobotics and soft, origami-based robots.

Kyushu Railway Company

Kyushu Railway Company (九州旅客鉄道), known as JR Kyushu, is the passenger railway operator on Japan's Kyushu island, created in the 1987 privatization of Japanese National Railways.

Kyutai (company)

Kyutai is a French nonprofit AI research lab in Paris, launched in November 2023 by Xavier Niel, Rodolphe Saadé, and Eric Schmidt with about €300 million.

Kyvos Insights

Kyvos Insights: Los Gatos, California company whose Kyvos semantic layer and Smart OLAP platform serve enterprise BI and AI; emerged from stealth in June 2015 with OLAP-on-Hadoop technology.

L (New York City Subway service)

The L, officially the 14th Street-Canarsie Local, is a New York City Subway service running at all times between 8th Avenue, Manhattan, and Canarsie, Brooklyn.

L band

L band is the portion of the microwave radio spectrum from 1 to 2 GHz, used for GPS signals, aeronautical navigation, mobile satellites, and Earth-observing radar that penetrates vegetation.

L-band EDFA

An L-band EDFA is an erbium-doped fiber amplifier operating at roughly 1565 to 1625 nm, extending WDM amplification beyond the C band using longer fiber coils.

L. David Montague

L. David Montague is an American aerospace engineer who led Lockheed Martin's Missile Systems Division and was elected to the National Academy of Engineering in 1991.

L. Eric Cross

L. Eric Cross, born Leslie Eric Cross (1923–2016), was a British-born materials scientist at Pennsylvania State University who established the phenomenology of PZT and relaxor ferroelectrics.

L. Gary Leal

L. Gary Leal is an American chemical engineer at the University of California, Santa Barbara, known for work on the fluid mechanics and rheology of complex fluids.

L. Jay Guo

L. Jay Guo is a University of Michigan electrical engineer known for nanoimprint lithography, including the first silicon nano-transistors made by the method in 1997.

L. Louis Hegedus

L. Louis Hegedus (1941–2017) was a Hungarian-born American chemical engineer known for catalytic converter research at General Motors and elected to the National Academy of Engineering in 1989.

L. Wally Holm

L. Wally Holm, born Leroy Wallace Holm, was an American petroleum engineer at Unocal and a pioneer of carbon dioxide flooding, elected to the National Academy of Engineering in 1986.

L.L.Bean

L.L.Bean is a privately held, family-owned American outdoor retailer headquartered in Freeport, Maine. Founded in 1912 by Leon Leonwood Bean, it is known for the Bean Boot.

L'Année philologique

L'Année philologique (APh Online) is the international reference bibliography of classical studies, indexing more than 1,000 journals on ancient Greece and Rome from 1928 onward.

L'Arc Macau

L'Arc Macau: hotel, casino and serviced-apartment complex in NAPE, Macau Peninsula, opened 21 September 2009 with 283 five-star rooms; SJM satellite casino taken over directly by SJM on 30 December 2025.

L'Enfant Plaza station

L'Enfant Plaza station: two-level Washington Metro transfer station under 7th and D Streets SW, opened 1977, serving Blue, Orange, Silver, Yellow, and Green Lines, third-busiest with 15,080 weekday riders in May 2025.