61,984 articles
Common rail
Common rail is a diesel fuel injection system in which a high-pressure pump feeds a shared rail that supplies electronically controlled injectors, introduced in 1997.
Common spatial pattern
Common spatial pattern (CSP) is a supervised signal processing method that computes spatial filters separating two classes of multichannel signals, used mainly in motor-imagery brain–computer interfaces.
Common subexpression elimination
Common subexpression elimination (CSE) is a classic compiler optimization that computes a repeated subexpression once, storing the result and replacing later occurrences with a fetch.
Common Tactical Wheeled Vehicle
The Common Tactical Wheeled Vehicle (共通戦術装輪車, CTWV) is a Japanese family of eight-wheeled armored vehicles built by Mitsubishi Heavy Industries for the Japan Ground Self-Defense Force.
Common Vision Blox
Common Vision Blox (CVB) is a commercial machine vision software development kit published by STEMMER IMAGING since 1993, providing hardware-independent image acquisition, processing, and pattern-recognition libraries for industrial inspection on Windows and Linux.
Common Voice
Common Voice is a crowdsourced, public-domain speech corpus run by the Mozilla Foundation, launched in 2017, in which volunteers record and validate voice clips for speech recognition.
Common Vulnerabilities and Exposures
Common Vulnerabilities and Exposures, also known as the CVE Program, is a list of standardized identifiers and short descriptions for publicly disclosed cybersecurity vulnerabilities, launched in 1999 by MITRE.
Common Vulnerability Scoring System
The Common Vulnerability Scoring System (CVSS) is an open framework, maintained by FIRST, that scores software vulnerabilities from 0.0 to 10.0 and enriches CVE records in the National Vulnerability Database.
Common Warehouse Metamodel
Common Warehouse Metamodel (CWM), also known as ISO/IEC 19504, is OMG's metamodel for interchanging warehouse and business intelligence metadata across tools, built on UML, MOF, and XMI, formal version 1.1 (March 2003).
Common-mode leakage current
Common-mode leakage current is an unwanted current that flows between a photovoltaic array and the grid through parasitic capacitance, the defining safety problem of transformerless PV inverters.
Common-mode rejection ratio
Common-mode rejection ratio (CMRR), also called common-mode rejection, is the ratio of an amplifier's differential gain to its common-mode gain, a key performance measure for precision operational and instrumentation amplifiers.
CommonMark
CommonMark is a standardized, unambiguous specification of the Markdown formatting syntax, begun in 2014 to resolve ambiguities in John Gruber's original 2004 Markdown, with 652 test examples and reference parsers in C and JavaScript.
Commonwealth Edison
Commonwealth Edison, known as ComEd, is an investor-owned electric utility serving more than 400 municipalities in northern Illinois, including Chicago, and operates as a subsidiary of Exelon.
Commonwealth Fusion Systems
Commonwealth Fusion Systems is an American private fusion company spun out of MIT in 2018 that is building SPARC, a compact net-energy tokamak, in Devens, Massachusetts.
Commonwealth LNG
Commonwealth LNG is a liquefied natural gas production and export terminal on the west bank of the Calcasieu Ship Channel near Cameron, Louisiana, permitted for 9.5 million tonnes per year.
CommScope
CommScope was an American network infrastructure company headquartered in Hickory, North Carolina. Founded in 1976, it was dismantled through divestitures ending with the name passing to Amphenol in January 2026.
Communication channel
A communication channel is the medium through which information travels from a transmitter to a receiver, spanning copper cable, optical fiber, free space, and abstract statistical models.
Communication complexity
Communication complexity is the study of the minimum number of bits two parties must exchange to compute a function when each holds only part of the input.
Communication protocol
A communication protocol, also known as a networking or computer protocol, is a set of rules and formats that determines how computing systems exchange messages over a network.
Communication with submarines
Communication with submarines is the set of radio, acoustic, and optical techniques for exchanging messages with submerged vessels, since seawater blocks ordinary radio and navies rely on very low and extremely low frequency transmitters.
Communication Workers Union (United Kingdom)
The Communication Workers Union (CWU) is a British trade union for postal, telecom, and technology workers, formed in 1995, with about 185,000 members and led by general secretary Dave Ward.
Communications Act 2003
The Communications Act 2003 is an Act of the UK Parliament that reorganised regulation of television, radio, and electronic communications, transferring most regulatory functions to Ofcom.
Communications Act of 1934
The Communications Act of 1934, also called the Federal Communications Act, is a US federal law signed June 19, 1934, creating the FCC to regulate wire and radio communication.
Communications Assistance for Law Enforcement Act
The Communications Assistance for Law Enforcement Act is a 1994 United States federal law requiring telecommunications carriers to keep their networks capable of supporting court-ordered wiretaps.
Communications Authority of Kenya
The Communications Authority of Kenya is the regulatory agency for Kenya's information and communications sector, established in 1999 under the Kenya Information and Communications Act.
Communications platform as a service
Communications platform as a service (CPaaS) is a cloud delivery model that lets organizations embed voice, video, and messaging into their applications via APIs, paying per use.
Communications Regulatory Authority (Lithuania)
The Communications Regulatory Authority (RRT) is an independent state institution regulating electronic communications and postal services in Lithuania, established in 2001 and also supervising the digital space, radio spectrum auctions, and railway transport.
Communications satellite
A communications satellite is a spacecraft that relays radio signals between ground stations or other spacecraft using transponders, enabling telephone, television, data, and broadband services without terrestrial cables.
Communications Satellite Act of 1962
The Communications Satellite Act of 1962, the Comsat Bill, is a US federal law signed by President Kennedy on August 31, 1962, establishing a commercial global satellite system.
Communications security
Communications security (COMSEC) is the body of United States statutes, regulations, and court decisions protecting the confidentiality of communications and customer data, while defining limited government access.