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Longleat
Longleat is a Wiltshire stately home and estate near Horningsham, seat of the Marquesses of Bath. Its Elizabethan house (1567–1580) opened to the public in 1949, and its 1966 Safari Park was the first outside Africa.
Longley–Rice model
The Longley–Rice model, formally the Irregular Terrain Model (ITM), is a radio propagation model developed at the U.S. National Telecommunications and Information Administration in 1968.
LongNet
LongNet is a Transformer variant introduced by Microsoft Research in July 2023 that scales sequence length to over 1 billion tokens through dilated attention, cutting quadratic cost to linear.
Longship
The longship, called langskip in Old Norse, is a long, narrow Viking warship built for speed and shallow water, powered by oars and a square sail.
Longshoreman
A longshoreman is a worker who loads and unloads cargo ships, dock work that has historically given workers leverage at the transfer point between sea and land transport.
Longsword
The longsword, also called the bastard sword or hand-and-a-half sword, is a European sword of roughly 1350 to 1550, held in one or two hands.
LongTail Ad Solutions, Inc.
LongTail Ad Solutions, Inc., doing business as JW Player, is a New York-based video technology company offering hosting, streaming, analytics, and ad monetization, merged into JWP Connatix in 2024.
Longtan Dam
Longtan Dam (龙滩大坝) is a roller-compacted concrete gravity dam on the Hongshui River in Guangxi, China, the tallest of its kind, anchoring the 6,300 MW Longtan Hydropower Station begun in 2001.
LongVie
LongVie is an open framework for controllable ultra-long video generation, released in August 2025 by NVIDIA and partners, with LongVie 2 following in December 2025 and claiming five-minute generation.
Longwall mining
Longwall mining is an underground coal mining method in which a shearer extracts coal in slices behind self-advancing hydraulic roof supports that let the roof collapse.
Longwood House
Longwood House is a residence on the island of Saint Helena in the South Atlantic, best known as Napoleon Bonaparte's final home, where he died in 1821.
Longya Xu
Longya Xu is an electrical engineer in power electronics and electric machines who spent over 30 years at Ohio State before joining FAMU-FSU College of Engineering in 2023.
Longyangxia Dam (龙羊峡大坝)
Longyangxia Dam (龙羊峡大坝) is a large dam and 1,280 MW hydropower station on the upper Yellow River in Qinghai, China, completed in 1992 with multiyear regulation capacity.
Longyangxia hydroelectric plant
Longyangxia hydroelectric plant (龙羊峡水电站) is a 1,280 MW hydropower station on the upper Yellow River in Gonghe County, Qinghai, China, fully completed in 1992 and the leading reservoir of the upper Yellow River cascade.
Lonnie Johnson (inventor)
Lonnie George Johnson, born 1949, is an American inventor and aerospace engineer from Mobile, Alabama, best known for the Super Soaker water gun and a career at NASA's Jet Propulsion Laboratory.
Lonny L. Thompson
Lonny L. Thompson is an American mechanical engineer and computational mechanician who spent thirty years at Clemson University, working on structural acoustics and winning a 1997 PECASE award.
LonWorks
LonWorks (local operating network) is a control networking platform developed by Echelon Corporation and released in 1988, widely used in building automation, industrial control, and transportation.
Look and feel
Look and feel is a software design term for a program's visual design and interactive behavior, central to United States copyright disputes of the late 1980s and 1990s.
Look-and-move
Look-and-move is an architecture for vision-guided robot control in which vision provides set-points to a fast internal joint controller, a hierarchical scheme most visual servoing systems use.
Looker Studio
Looker Studio is Google's free data visualization and dashboarding tool, originally Data Studio (2016), renamed Looker Studio in October 2022 with a $9 Pro tier, and renamed back to Data Studio in April 2026.
LookML
LookML (Looker Modeling Language) is Looker's proprietary semantic modeling language, created by Lloyd Tabb around 2012, defining dimensions, measures, explores, and views; Google opened it partly via the BigQuery-only Open SQL Interface in 2024.
Lookout, Inc.
Lookout, Inc. is an American cybersecurity company headquartered in San Francisco and founded in 2007, known for mobile endpoint security, with more than 210 million devices analyzed, and led by CEO Jim Dolce.
Lookup table
A lookup table (LUT) is a precomputed array of values a program retrieves by index instead of computing them at run time, trading memory for speed.
Loon Lake (California)
Loon Lake is a reservoir in the Sierra Nevada of El Dorado County, California, about 35 miles northeast of Placerville, impounded by a dam SMUD completed in 1963.
Loon LLC
Loon LLC, also known as Project Loon, was an Alphabet subsidiary using stratospheric balloons to deliver 4G internet, launched in Kenya in 2020 and shut down in 2021.
Loongson
Loongson (龙芯) is a Chinese fabless CPU manufacturer whose processors use its own LoongArch instruction set architecture, developed from the Godson project begun in 2001.
Loop (statement)
A loop statement is a control-flow construct in programming languages that executes a statement or block repeatedly under the control of a condition, iterator, or counter.
Loop antenna
A loop antenna, also called a loop or frame aerial, is a radio antenna made of one or more turns of conductor in a closed loop, used from AM radios to amateur HF transmitters.
Loop closure detection
Loop closure detection, also called place recognition, is the part of a SLAM system that recognizes when a robot revisits a mapped location, letting it correct accumulated odometry drift.
Loop fission
Loop fission, also called loop distribution, is a compiler optimization that splits one loop into several loops over the same index range, reducing register pressure and enabling vectorization.