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Crystal detector
The crystal detector, also called the cat's-whisker detector, is a rectifying contact between a fine wire and a semiconducting crystal, used in early radio receivers such as crystal sets of the early 1920s.
Crystal Diffusion Variational Autoencoder (CDVAE)
CDVAE (Crystal Diffusion Variational Autoencoder) is a generative machine learning model proposed at MIT in 2021 that creates new periodic crystal structures using a variational autoencoder with a diffusion-style denoising decoder.
Crystal graph convolutional neural network
Developed by Tian Xie and Jeffrey C. Grossman at MIT in 2018, CGCNN is a graph neural network framework that predicts material properties from crystal structures.
Crystal oscillator
A crystal oscillator, also known as a quartz oscillator, is an electronic circuit that uses the mechanical resonance of a quartz crystal to generate a precise, stable electrical frequency.
Crystal Palace transmitting station
The Crystal Palace transmitting station, a broadcasting and telecommunications site in the Crystal Palace area of south London, has been the main television transmitter for London since 1956.
Crystal radio
A crystal radio receiver, also called a crystal set, is a simple AM radio receiver powered solely by the radio waves it captures, with no battery or external power supply.
Crystal River Energy Complex
Crystal River Energy Complex is a Duke Energy power site in Citrus County, Florida, combining coal, nuclear, and natural gas generation about 85 miles north of Tampa.
Crystal River nuclear power plant
Crystal River Unit 3 was a pressurized water reactor in Citrus County, Florida, operating from 1977 to 2013 after containment damage during a steam generator replacement.
CRYSTALS-Kyber
CRYSTALS-Kyber is a lattice-based key encapsulation mechanism with which two parties establish a shared secret key, standardized by NIST in August 2024 as ML-KEM in FIPS 203 and believed secure against quantum attack.
CS Disco, Inc.
CS Disco, Inc., marketed as DISCO, is an American legal technology company founded in 2013 in Houston that sells AI-powered ediscovery and document review software to law firms.
CS Energy
CS Energy is a Queensland Government-owned energy corporation, established in 1997, that generates electricity in Australia's National Electricity Market and retails to large commercial and industrial customers.
CS Pacific
CS Pacific was a Danish submarine cable repair ship built in Copenhagen in 1903 for the Great Northern Telegraph Company, serving in Far Eastern waters until 1950.
CS Unplugged
CS Unplugged (Computer Science Unplugged) is a free teaching resource that teaches computer science through games and puzzles using cards, string, and crayons, with no computer required.
CS-23
CS-23 is the EASA certification specification for normal-category aeroplanes with up to 19 seats, first issued in 2003 and harmonized with the FAA's 14 CFR Part 23.
CS-25
CS-25, the Certification Specifications for Large Aeroplanes, is EASA's airworthiness code for turbine-powered large aeroplanes, the European counterpart of the FAA's 14 CFR Part 25.
CS50
CS50, or CS50x online, is Harvard University's introductory computer science course, open to students with or without prior programming experience and led by David J. Malan since 2007.
CSA A23.3
CSA A23.3, titled Design of Concrete Structures, is the Canadian national standard for the structural design of reinforced and prestressed concrete buildings, referenced by the National Building Code of Canada.
CSA S16
CSA S16 is the Canadian national standard for designing, fabricating, and erecting steel structures, published by CSA Group; its current edition, S16:24, dates from 2024.
CSI Compressco LP
CSI Compressco LP was a natural gas compression and treating services partnership formed in 2014 and traded on NASDAQ as CCLP until Kodiak Gas Services acquired it in 2024.
CSIA (Indiana gas regulatory mechanism)
The Compliance and System Improvement Adjustment (CSIA) is an Indiana surcharge mechanism allowing natural gas utilities to recover pipeline safety and infrastructure costs through IURC-approved rate increases.
CSIRO Data61 Wildcat
Wildcat is 3D SLAM software from CSIRO's Data61 in Australia that maps surroundings and localizes in real time without GPS, as used in the DARPA Subterranean Challenge.
CSIRO Robotics
CSIRO Robotics is the robotics research program of CSIRO, Australia's national science agency, based at QCAT in Brisbane and known for field robotics, autonomous systems, and second place in the DARPA Subterranean Challenge.
CSMS (charging station management system)
A CSMS, also called a charge point management system (CPMS), is backend software for the remote, real-time operation of electric vehicle charge points, typically speaking the Open Charge Point Protocol (OCPP).
CSO (satellite)
CSO (Composante Spatiale Optique) is a French military Earth-observation system of three identical satellites providing very-high-resolution visible and infrared imagery, launched between 2018 and 2025 as part of the MUSIS program.
CsPbI3 all-inorganic perovskite solar cells
CsPbI3 all-inorganic perovskite solar cells are photovoltaic devices whose absorber is cesium lead iodide, more thermally robust than hybrid perovskites but prone to converting to a yellow phase.
CsPbI3 black-phase stabilization at room temperature
CsPbI3 black-phase stabilization at room temperature refers to strategies keeping the photoactive black phase of cesium lead iodide from converting to the useless yellow δ phase.
CSS
CSS, or Cascading Style Sheets, is a language for describing the rendering of structured documents such as HTML, used for style like fonts, colors, and spacing on web pages.
CSS Containment
CSS Containment is a CSS feature that lets authors tell the browser an element is independent of the rest of the document, exposed through the contain and content-visibility properties.
CSS filter effects
CSS filter effects are graphical operations that process an element's rendering before display, adding blurs, color shifts, shadows, and transparency through the CSS filter and backdrop-filter properties.
CSS specificity and the cascade
CSS specificity and the cascade are how a browser decides which competing style declaration sets an element's final property value, sorting declarations by origin, layers, and specificity.