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Cookie jar (computing)
A cookie jar, also called a cookie store, is the data structure in an HTTP client that stores cookies from servers, decides which to send with each request, and persists them to disk.
Cool box
A cool box, also called a cooler, is a portable insulated container that keeps food and drink cold with ice or ice packs; powered versions use thermoelectric modules or compressors.
Cool Robot
The Cool Robot is a four-wheel-drive, solar-powered autonomous rover developed by Dartmouth College and CRREL for summertime science campaigns across the ice sheets of Antarctica and Greenland.
Cool roof
A cool roof is a roof that reflects more sunlight and releases more absorbed heat than a conventional roof, staying cooler and cutting building cooling energy use.
Coolant
A coolant, also called a cooling liquid, is a fluid circulated through a machine or process to carry heat away, with water and glycol mixtures most common.
Cooley–Tukey FFT algorithm
The Cooley–Tukey FFT algorithm is a divide-and-conquer method published by James Cooley and John Tukey in 1965 that computes the discrete Fourier transform in O(N log N) operations instead of O(N²).
Cooling tower
A cooling tower, also called a wet cooling tower, is a heat-rejection device that cools water by evaporating part of it, serving power plants, refineries, and large commercial buildings.
Cooper nuclear power plant
Cooper Nuclear Station is a single-unit boiling water reactor plant near Brownville, Nebraska, owned and operated by the Nebraska Public Power District since 1974 and generating about 835 megawatts.
Cooper Tire & Rubber Company
Cooper Tire & Rubber Company, also known as Cooper Tires, was an American tire manufacturer in Findlay, Ohio, founded in 1914 and acquired by Goodyear in 2021.
Cooperative A*
Cooperative A (CA) is a multi-agent pathfinding algorithm introduced by David Silver in 2005 that plans collision-free routes for many agents through a shared reservation table.
Cooperative adaptive cruise control
Cooperative adaptive cruise control (CACC) is a vehicle control method extending adaptive cruise control with vehicle-to-vehicle communication, holding short time gaps that prevent phantom traffic jams.
Cooperative ARQ
Cooperative ARQ is a link-layer error-control technique combining automatic repeat request with cooperative relaying: when a destination fails to decode a packet, an overheard relay retransmits it.
Cooperative Cyber Defence Centre of Excellence
The Cooperative Cyber Defence Centre of Excellence (CCDCOE) is a NATO-accredited international cyber defense hub in Tallinn, Estonia, known for the Tallinn Manual and Locked Shields.
Cooperative diversity
Cooperative diversity is a wireless communication technique in which nearby terminals relay signals for one another, letting single-antenna nodes act like a virtual antenna array against fading.
Cooperative Energy
Cooperative Energy, formerly South Mississippi Electric, is a not-for-profit, member-owned generation and transmission cooperative in Hattiesburg, Mississippi, founded in 1941 to supply 11 distribution cooperatives serving about 460,000 members across 55 counties.
Cooperative intelligent transport system
A cooperative intelligent transport system (C-ITS) is a road transport system in which vehicles, infrastructure, and road users exchange information over wireless links to improve traffic safety, known in the US as connected vehicle technology.
Cooperative localization
Cooperative localization is a wireless positioning technique in which devices with unknown locations make measurements with each other and with anchors, letting position information flow through the network.
Cooperative MIMO in sensor networks
Cooperative MIMO, also called virtual MIMO, is a wireless sensor network technique in which cooperating single-antenna nodes emulate a multi-antenna system, saving energy when transmission distances exceed a threshold.
Cooperative non-orthogonal multiple access
Cooperative non-orthogonal multiple access, also called cooperative NOMA or C-NOMA, is a wireless multiple-access scheme combining power-domain NOMA with relaying, proposed for 5G and studied for beyond-5G networks.
Cooperative optimization
Cooperative optimization is a global optimization method that decomposes a hard energy function into coupled subproblems, formulated by Xiaofei Huang in 2004 for computer vision labeling.
Cooperative spectrum sensing
Cooperative spectrum sensing (CSS) is a cognitive radio technique in which secondary users share sensing results at a fusion center to reliably detect licensed primary users despite fading, shadowing, and hidden terminals.
Cooperative spectrum sharing
Cooperative spectrum sharing (CSS) is a cognitive radio technique in which unlicensed secondary users relay licensed primary users' traffic in exchange for access to the licensed spectrum.
Coopers Brewery
Coopers Brewery, also known as Coopers Brewery Limited, is an Australian brewery in Adelaide founded in 1862 by Thomas Cooper, Australia's oldest family owned brewery.
Coordinate-measuring machine
A coordinate-measuring machine (CMM), also called a coordinate measurement machine, is a measuring device that checks manufactured parts against design specifications by sampling surface coordinates.
Coordinated beamforming
Coordinated beamforming is a multi-cell wireless technique in which neighboring base stations jointly design transmit beams to reduce inter-cell interference, exchanging only channel information, not user data.
Coordinated motion control
Coordinated motion control is the control of multiple motion axes so each updates its movement depending on the performance and feedback of the others, rather than acting independently.
Coordinated multipoint
Coordinated multipoint (CoMP) is a set of cellular network techniques in which separated base stations jointly transmit and receive signals to reduce interference, proposed in 3GPP Release 9.
CoP hydrogen-evolution catalysts
CoP hydrogen-evolution catalysts are cobalt phosphide electrocatalysts, including CoP, Co₂P, and CoP₂, that drive the hydrogen evolution reaction during water electrolysis as low-cost alternatives to platinum-group catalysts.
COP28 declaration to triple nuclear energy
The Declaration to Triple Nuclear Energy is a 2023 pledge by 22 countries at COP28 in Dubai to triple nuclear capacity from 2020 levels by 2050.
Copa Airlines
Copa Airlines, legally Compañía Panameña de Aviación, is the flag carrier of Panama, founded in 1947 and flying from its Panama City hub to 84 destinations.