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CSS Transitions
CSS Transitions is a CSS feature that makes a property change take place gradually over a set duration instead of instantly, controlled in practice by the transition shorthand property.
CSS utility-first styling
CSS utility-first styling is a method of building web interfaces by composing designs from many small, single-purpose utility classes applied directly in markup, an approach associated with Tailwind CSS.
CSS Virginia
CSS Virginia was a Confederate ironclad ram, rebuilt from the frigate USS Merrimack in 1862, that sank two Union ships before dueling USS Monitor to a draw.
CSS writing modes
CSS writing modes are the combinations of text direction and orientation CSS supports for international typography, including right-to-left scripts and vertical text such as Chinese and Japanese.
CST Studio Suite
CST Studio Suite is a commercial 3D electromagnetic analysis software package from Dassault Systèmes, used to design and optimize antennas, filters, motors, and other electromagnetic components.
CSUN Assistive Technology Conference
The CSUN Assistive Technology Conference, founded in 1985 by Harry Murphy, is an annual conference on assistive technology hosted by California State University, Northridge, drawing thousands of attendees, researchers, and technology companies each year.
CSX 8888 incident
The CSX 8888 incident, also called the Crazy Eights incident, was a 2001 runaway freight train that rolled unmanned for 66 miles through Ohio before being stopped.
CSX Transportation
CSX Transportation is a Class I freight railroad, the main subsidiary of CSX Corporation, operating about 20,000 route miles in 26 eastern U.S. states, Washington, D.C., and Canada.
CT saturation
CT saturation is the condition where a current transformer's magnetic core saturates, so its secondary current is distorted and no longer proportional to the primary current.
CT2
CT2, also known as Telepoint, is a digital cordless telephone standard developed in the United Kingdom, first published in 1989 and used for public Telepoint services.
CTIA
CTIA, founded in 1984 as the Cellular Telephone Industries Association, is an American trade association for the wireless industry, advocating on spectrum policy and running device certification since 1991.
CTrain
CTrain, also known as Calgary LRT, is the light rail system of Calgary, Alberta, operated by Calgary Transit since 1981 on the Red Line and the Blue Line.
CTU-CRAS-Norlab
CTU-CRAS-Norlab was a joint Czech–Canadian robotics team, formed by the Czech Technical University's CRAS and Université Laval's Norlab to compete in the DARPA Subterranean Challenge.
Cu-Al-Ni shape memory alloy
Cu-Al-Ni shape memory alloy is a copper-based alloy of roughly 14% aluminum and 4% nickel that recovers a preset shape when heated, studied as a cheaper, higher-temperature alternative to NiTi.
Cu-SSZ-13 single-site catalyst for methane-to-methanol
Cu-SSZ-13 is a copper-exchanged chabazite (CHA) zeolite whose isolated [Cu(OH)]⁺ single sites confined in six-membered rings catalyze the direct partial oxidation of methane to methanol, an alternative to the syngas route.
Cu2ZnSnS4 kesterite solar cells
Cu2ZnSnS4 (CZTS) kesterite solar cells are thin-film photovoltaic devices using earth-abundant kesterite absorbers, with certified efficiencies reaching 16.6% in 2025 and potential as tandem bottom cells.
Cub Cadet
Cub Cadet is an American brand of lawn and garden tractors and zero-turn mowers, launched by International Harvester in 1961 and owned since 2021 by Stanley Black & Decker.
Cuba Special Period energy shortage
The Cuba Special Period energy shortage was the collapse of Cuba's electricity and fuel supply in the 1990s, when the Soviet Union's dissolution cut off subsidized oil imports.
Cuban link chain
A Cuban link chain is a dense curb-chain variant whose twisted oval links press flat into an almost solid surface, strongly associated with Miami and hip-hop jewelry culture.
Cubana de Aviación
Cubana de Aviación, commonly known as Cubana, is Cuba's government-owned flag carrier, founded in 1929 and headquartered in Havana, and one of Latin America's earliest airlines.
Cubase
Cubase is a digital audio workstation developed by Steinberg of Hamburg, first released in 1989 for the Atari ST and sold in Pro, Artist, and Elements editions.
Cubature Kalman filter
The cubature Kalman filter (CKF) is a derivative-free nonlinear state-estimation algorithm introduced by Arasaratnam and Haykin in 2009, which propagates 2n equal-weight cubature points and needs no parameter tuning.
Cube storage (warehouse automation)
Cube storage is a form of automated storage and retrieval in which robots on top of an aisle-free grid dig and deliver stacked bins to workstations.
CubePilot Cube
The CubePilot Cube, begun as the Pixhawk 2.1, is a family of autopilot-on-module flight controllers whose replaceable cubic module plugs into a carrier board, supported by ArduPilot and PX4.
CubeRover
CubeRover is a class of small lunar rovers built by Astrobotic Technology with Carnegie Mellon University, applying the CubeSat idea of standardized, low-cost spacecraft to lunar surface mobility.
CubeSat
A CubeSat, or U-class satellite, is a miniaturized research satellite built in multiples of a 10 cm cube, a standard created in 1999 to give students and small teams cheap access to space.
Cubetto
Cubetto is a screen-free coding toy made by London-based Primo Toys, a wooden robot programmed with colored blocks, teaching programming to children aged 3 to 6.
CUBIC TCP
CUBIC is a TCP congestion control algorithm that grows the window as a cubic function of time since the last congestion event, replacing Reno's linear growth.
CubicPV
CubicPV is an American solar technology company based in Bedford, Massachusetts, formed in 2021 by the merger of wafer maker 1366 Technologies and perovskite developer Hunt Perovskite Technologies.
cuBLAS
cuBLAS is NVIDIA's GPU-accelerated implementation of the BLAS (Basic Linear Algebra Subprograms) standard, shipped with the CUDA Toolkit for dense linear algebra, above all matrix multiplication, on NVIDIA GPUs.