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Kerb ramp
A kerb ramp, called a curb ramp or curb cut in American usage, is a short ramp linking a sidewalk to the roadway for wheelchair users.
Kerberos (protocol)
Kerberos, also known as the Kerberos authentication protocol or Krb5, is a network authentication protocol developed at MIT in the 1980s and standardized in 1993.
Kerckhoffs's principle
Kerckhoffs's principle, also known as Shannon's maxim, is a cryptography rule set out by Auguste Kerckhoffs in 1883: security should rest on the secret key alone.
Kereta Api Indonesia
Kereta Api Indonesia (KAI) is Indonesia's state-owned railway company providing passenger and freight services; in 2025 KAI Group carried 442 million passengers and nearly 70 million tons of freight.
Kereta Cepat Indonesia China
Kereta Cepat Indonesia China (KCIC) is an Indonesian-Chinese joint venture company formed in 2015 that built and operates the Whoosh high-speed railway between Jakarta and Bandung, opened in 2023.
Keretapi Tanah Melayu
Keretapi Tanah Melayu, also known as Malayan Railways, is the national railway of Peninsular Malaysia, tracing its first tin-hauling line to 1885 and corporatized as KTMB in 1992.
Kerman power station
Kerman power station (نیروگاه برق کرمان) is a 1,912-megawatt combined-cycle gas-fired power station in Kerman, Iran, ranked among the country's largest plants and operating since 2009.
Kern Island Canal
The Kern Island Canal is an irrigation canal in Kern County, California, diverting Kern River water south of Bakersfield to farmland on the former Kern Lake bed.
Kern River Gas Pipeline
The Kern River pipeline is an interstate natural gas pipeline running about 1,700 miles from southwestern Wyoming through Utah and Nevada to California, in service since 1992.
Kern River Oil Field
The Kern River Oil Field is a giant heavy-oil field east of Bakersfield, California, discovered in 1899, with more than 2.2 billion barrels produced largely by steam flooding since 1964.
Kernel (image processing)
A kernel in image processing is a small matrix of coefficients slid across an image and combined with its pixels by convolution to produce each output pixel of the filtered result.
Kernel (operating system)
The kernel, also called the operating system kernel, is the core program of an operating system that runs in privileged hardware mode, controlling memory, devices, and program isolation.
Kernel clustering
Kernel clustering is a family of clustering methods that groups data points by pairwise similarity with a kernel function, capturing non-linearly separable clusters that plain k-means misses.
Kernel method
Kernel methods, also called kernel machines, are machine learning algorithms that operate on a matrix of pairwise similarities, letting linear algorithms handle nonlinear patterns in high-dimensional feature spaces.
Kernel panic
A kernel panic is the action an operating system kernel takes on an unrecoverable internal error: it prints a diagnostic message, then halts or reboots the machine.
Kernel PCA
Kernel PCA, or kernel principal component analysis, is a nonlinear extension of PCA that uses the kernel trick, introduced by Schölkopf, Smola, and Müller in 1998.
Kernel ridge regression
Kernel ridge regression (KRR) is a nonlinear regression method that combines ridge regression with the kernel trick, yielding a closed-form predictor used in molecular property prediction and genomic prediction.
Kernel trick
The kernel trick is a machine learning technique that lets algorithms operate in high-dimensional feature spaces by replacing inner products with a kernel function, as in support vector machines.
Kernel-based Virtual Machine
Kernel-based Virtual Machine, or KVM, is a virtualization module built into the Linux kernel that turns the kernel into a hypervisor, included in mainline Linux since kernel version 2.6.20.
Kernel-level anti-cheat
Kernel-level anti-cheat is game-security software that runs as a signed driver in the operating system kernel, adopted because cheats had moved into the kernel themselves; major systems include Riot Vanguard, Easy Anti-Cheat, and BattlEye.
Kernelization
Kernelization is a framework in parameterized complexity theory for analyzing provably efficient and provably effective data reduction for NP-hard problems, originating in the early 1990s.
Kerner's three-phase traffic theory
Kerner's three-phase traffic theory, introduced by Boris S. Kerner in 1996–2000, divides freeway congestion into three phases: free flow, synchronized flow, and the wide moving jam.
Kerning
Kerning is the adjustment of horizontal space between two specific letters in typeset text, such as "AV" or "Ty", so that pairs with contrasting shapes appear evenly spaced.
Kerosene lamp
A kerosene lamp, also known as a paraffin lamp, is a lighting device that burns kerosene through a wick or pressurized jet, long used where electricity is absent.
Kerr, Stuart and Company
Kerr, Stuart and Company was a British locomotive manufacturer founded in Glasgow in 1881, based at Stoke-on-Trent, which built about 1,500 locomotives before collapsing in 1930.
Kerry Airport
Kerry Airport, also known as Farranfore Airport or Aerfort Chiarraí, is a regional airport at Farranfore, County Kerry, Ireland, serving Killarney and Tralee and carrying 440,367 passengers in 2025, a record.
Keshen Gas Field
The Keshen Gas Field is an ultra-deep, ultra-high-pressure tight sandstone gas field in the Tarim Basin, Xinjiang, China, opened up by Well KS2 in 2008.
Kessler syndrome
The Kessler syndrome, also called the Kessler effect, is a theoretical runaway cascade of orbital debris collisions proposed by NASA scientists Donald Kessler and Burton Cour-Palais in 1978.
Kestra (software)
Kestra is an open-source, Apache 2.0 orchestration platform in Java for data, AI, and infrastructure workflows, defined in YAML. First released February 2022; version 2.0 (September 2026) rebuilt the engine around gRPC workers and AI features.
Kestrel Coal Mine
Kestrel Coal Mine is an underground metallurgical coal mine in Queensland's Bowen Basin, about 40 km north-east of Emerald, Australia, producing hard coking coal for export steelmaking since 1992.