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Crank-slider mechanism
A crank-slider mechanism, also called a slider-crank, is a four-link linkage that converts rotation into reciprocating motion or the reverse, driving the pistons of internal combustion engines, pumps, and compressors.
Crankcase ventilation system
A crankcase ventilation system, or PCV system, circulates air through a running engine's crankcase to remove blowby gases and vapors that would dilute the oil.
Crankset
A crankset, called a chainset in the UK, is the bicycle part that converts leg force into chain rotation, made of two crank arms and one to three chainrings.
Crankshaft
A crankshaft is the rotating shaft of a reciprocating engine or compressor that converts the back-and-forth motion of pistons into rotary motion, using offset crankpins to which connecting rods attach.
Crankshaft position sensor
The crankshaft position sensor, also called a crank sensor, measures crankshaft speed and position for the engine control unit, which uses the signal to time fuel injection and ignition.
Crash cushion
A crash cushion, also called an impact attenuator, is a roadside safety device placed in front of rigid objects like bridge piers to stop vehicles safely.
Crash of the airship Italia
The crash of the airship Italia, also called the Italian airship Italia disaster, was the loss of Umberto Nobile's airship on Arctic ice near Svalbard on 25 May 1928.
Crash test
A crash test deliberately collides a road vehicle to measure survival space and deceleration severity, serving FMVSS 208 compliance testing and consumer rating programs like NCAP and IIHS.
Crashworthiness design
Crashworthiness design is the engineering practice of structuring a vehicle so that, in a collision, controlled and predictable deformation dissipates kinetic impact energy, protecting its occupants or cargo.
Crates.io
Crates.io is the default package registry for the Rust programming language, where Cargo publishes and downloads packages; it launched in 2014 and hosts over 283,000 crates.
Crawford Greenewalt
Crawford Greenewalt was an American chemical engineer who led DuPont as president from 1948 to 1962, directed its Manhattan Project plutonium work, and studied hummingbird flight.
Crawler crane
A crawler crane is a crane mounted on continuous crawler tracks, giving it high lift capacity and stability on soft ground without outriggers, mainly for heavy-lift projects.
Crawler-transporter
The crawler-transporter is a pair of giant tracked NASA vehicles, formally the Missile Crawler Transporter Facilities, that carry rockets from the Vehicle Assembly Building to the launch pads.
Cray
Cray, also known as Cray Inc. and HPE Cray, is an American supercomputing brand founded by Seymour Cray in 1972 and acquired by Hewlett Packard Enterprise in 2019.
Cray Slingshot
Cray Slingshot is a high-performance computing interconnect developed by Cray and continued at HPE after its 2019 acquisition, built on Ethernet hardware with custom protocols and switches.
Cray T3E
The Cray T3E is a massively parallel supercomputer sold by Cray Research from 1996, built from DEC Alpha 21164 processors scalable to 2,048 processing elements.
Cray X-MP
The Cray X-MP is a shared-memory parallel vector supercomputer sold by Cray Research from 1982 as the successor to the Cray-1, and was the fastest supercomputer in the world from 1983 to 1985.
Cray-1
The Cray-1, also known as Cray I, was a vector supercomputer designed by Seymour Cray and sold by Cray Research from 1976, the first commercially successful vector processor.
Cray-2
The Cray-2 was a vector supercomputer designed by Seymour Cray and manufactured by Cray Research from 1985 to 1990, described at release as the fastest computer in the world.
Crayfish optimization algorithm
The crayfish optimization algorithm (COA) is a swarm-based metaheuristic that models crayfish sheltering, competition, and foraging behaviors, introduced by Heming Jia and colleagues in 2023.
Crazy Mountain
Crazy Mountain is the name of a Colorado craft brewery founded in 2010 and a non-alcoholic lager brand launched in 2026 by George Clooney and partners.
Crazyflie
The Crazyflie is a small open-source quadcopter developed by Bitcraze AB of Malmö, Sweden, as a flying development platform for robotics research, education, and swarming.
CrCoNi
CrCoNi medium-entropy alloy is an equiatomic chromium, cobalt, and nickel alloy whose strength, ductility, and fracture toughness increase as temperature falls toward liquid helium temperatures.
CrCoNi-based medium- and high-entropy alloys
CrCoNi-based medium- and high-entropy alloys combine chromium, cobalt, and nickel. CrCoNi shows exceptional fracture toughness at cryogenic temperatures, with strength and ductility rising as temperature falls.
Créac'h Lighthouse
The Créac'h Lighthouse (French: phare du Créac'h) is an active lighthouse on the island of Ouessant in Brittany, France, first lit in 1863 and regarded as the most powerful in Europe.
CreaSolv process
The CreaSolv process is a solvent-based plastics recycling technology developed by CreaCycle GmbH and Fraunhofer IVV in Germany that selectively dissolves polymers from waste, keeping polymer chains intact.
Create React App
Create React App (CRA) was a command-line tool, first released in July 2016, that generated a fully configured single-page React application from one command; it was deprecated by the React team in February 2025.
Create, read, update and delete
Create, read, update and delete (CRUD) is the set of four basic operations on persistent data, named by James Martin in 1983 and standard across databases and APIs.
Creator (restaurant)
Creator, formerly known as Momentum Machines, is a culinary robotics company and burger restaurant that opened at 680 Folsom Street in San Francisco's SoMa district in 2018.
Credit scoring model
A credit scoring model is a statistical or machine learning method that estimates a borrower's probability of default, producing scores like the FICO score used in lending.