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Long Spruce hydroelectric plant
Long Spruce Generating Station is a run-of-river hydroelectric plant on the lower Nelson River in northern Manitoba, Manitoba Hydro's fourth station on the river, opened in 1977.
Long task (web performance)
A long task in web performance is any browser main-thread task running longer than 50 milliseconds without yielding, making the page feel unresponsive; the Long Tasks API detects them.
Long-context LLMs
Long-context LLMs are large language models trained to process very large context windows, which grew from 4K-8K tokens in 2022-2023 to 1M-2M tokens by 2026.
Long-distance calling
Long-distance calling is telephone communication between exchanges or countries outside the caller's local calling area, once billed per minute by distance and later folded into internet-based phone service.
Long-haul trucking
Long-haul trucking is the segment of road freight in which drivers move cargo long distances in tractor-trailers, sleeping away from home most nights under federal hours-of-service rules.
Long-Qing Chen
Long-Qing Chen is a materials scientist at Pennsylvania State University known for developing the phase-field method, a computational approach for predicting the microstructure and properties of engineering materials.
Long-Range Hypersonic Weapon
The Long-Range Hypersonic Weapon, known as Dark Eagle and abbreviated LRHW, is a US Army ground-launched hypersonic boost-glide missile with a reported range of 1,725 miles.
Long-range Wi-Fi
Long-range Wi-Fi extends wireless networking well beyond indoor range, through the sub-1 GHz Wi-Fi HaLow standard (IEEE 802.11ah) for IoT, or directional 2.4 and 5 GHz point-to-point links.
Long-Term Pavement Performance program
The Long-Term Pavement Performance program is a North American research program studying pavement performance, begun in 1987 under SHRP and run by the Federal Highway Administration.
Longannet power station
Longannet power station was a 2,400 MW coal-fired power station at Kincardine-on-Forth in Fife, Scotland, generating electricity from 1970 until 2016 as the last coal-fired power station in Scotland.
LongBench
LongBench is a bilingual English and Chinese benchmark testing long-context understanding in large language models across 21 tasks, released in August 2023 by Tsinghua University's THUDM group.
Longbridge plant
The Longbridge plant was a car factory in Longbridge, Birmingham, England, founded by Herbert Austin in 1905, building Austin, BMC, British Leyland, Rover, and MG vehicles until closure in 2005.
LongCat (coding models)
LongCat is a family of open-weight mixture-of-experts large language models released by the Chinese technology company Meituan beginning in August 2025, positioned for repository-level coding and agentic tool use.
LongCat-Video
LongCat-Video is a 13.6-billion-parameter open-source video generation model released by Meituan in October 2025, known for producing minutes-long videos through iterative continuation and released under the MIT License.
Longchamp (company)
Longchamp is a French luxury leather goods company founded in Paris in 1948 by Jean Cassegrain, known for the foldable Le Pliage bag and still family owned.
Longère
A longère is a traditional rural house of western France, most associated with Normandy and Brittany, laid out as a long, low, single-depth row of dwelling and farm rooms under one roof.
Longest common subsequence
The longest common subsequence (LCS) problem asks for the longest sequence formed from two sequences by deleting symbols, solved by dynamic programming and used in file comparison and biology.
Longest flights
The longest flights are scheduled nonstop airline services measured by great-circle distance, led since 2020 by Singapore Airlines' New York JFK–Singapore route at roughly 15,350 km and 18 hours 40 minutes.
Longest palindromic substring
The longest palindromic substring problem asks, for a given string, for its longest contiguous substring that reads the same forwards and backwards, solvable in O(n) time by Manacher's 1975 algorithm.
Longest recorded sniper kills
The longest recorded sniper kills are confirmed engagements at exceptional measured distances, tracked since 1967; the record is Viacheslav Kovalskyi's 3,800 m shot in Ukraine in 2023.
Longest trains
The longest trains are freight trains, the record being a 7.353 km, 682-wagon iron ore train run by BHP 275 km to Port Hedland, Western Australia, in 2001.
Longford to Long Island Point Replacement Oil Pipeline
The Longford to Long Island Point Replacement Oil Pipeline is a 187 km crude oil pipeline in Gippsland, Victoria, built by Esso in 2017 for about $400 million.
Longformer
Longformer is a transformer language model introduced in 2020 by AI2 researchers for long documents, replacing standard self-attention with a linear-cost mix of local and global attention.
Longhouse
A longhouse is a long, narrow rectangular dwelling that houses several families under one roof, built independently by cultures from Neolithic Europe to Viking Scandinavia and Borneo.
LONGi
LONGi, also known as LONGi Green Energy (隆基绿能), is a Chinese solar technology company founded in Xi'an in 2000, producing monocrystalline silicon wafers, cells, and modules.
Longines
Longines is a Swiss watchmaker based in Saint-Imier, Switzerland, since 1832, known for its winged hourglass logo and decades as official timekeeper of major sports events.
Longitudinal magnetic recording
Longitudinal magnetic recording is a hard disk drive technique in which each bit's magnetization lies in the plane of the disk, used from 1956 to the mid-2000s.
Longitudinal separation
Longitudinal separation is the air traffic control method of spacing aircraft along the same track by time or distance, used mainly in oceanic airspace without radar surveillance.
Longkaikou hydroelectric plant
Longkaikou hydroelectric plant (龙开口水电站) is a 1,800 MW hydroelectric station on the middle Jinsha River in Heqing County, Yunnan, China, owned by China Huaneng and fully operating since 2014.
Longkou 7-1 Oil and Gas Field
Longkou 7-1 (龙口7-1) is an oil and gas field in eastern Bohai Bay, China, discovered by CNOOC in 2024 and notable for record tested gas productivity in the bay.