CCN

CCN is a three letter acronym that stands for

In science and technology

 * Carbon Capture and Neutralization, (source: http://www.cuychainnovation.com/cuycha/)
 * Cement chemist notation was developed to simplify the formulas that cement chemists use on a daily basis
 * Cereal cyst nematode, a plant disease
 * Cerebro-Cortical Necrosis, a nutritional brain disease of cattle
 * Cloud condensation nuclei
 * Content-centric networking, approach to computer-networking architecture
 * Controlled-Controlled Not Gate, a component of a reversible computer. Also known as a Toffoli gate
 * Cyclomatic Complexity Number, a software metric
 * Certified Clinical Nutritionist, (source: Clinical Nutrition Certification Board at http://www.cncb.org/)
 * CYR61, CTGF, NOV, the first three proteins identified that belong to the "CCN" protein family. Also see CCN intercellular signaling protein

Organizations

 * Camino Cristiano Nicaragüense, a Nicaraguan political party
 * Caribbean Communications Network Ltd. - A unit of ONE Caribbean Media Ltd. based in Trinidad and Tobago
 * Centro Criptológico Nacional, Spanish Cryptography agency
 * Chebucto Community Net in Halifax, Nova Scotia
 * City College Norwich, a further education college in the United Kingdom
 * Commission de la capitale nationale: Canadian Crown Corporation, known in English as the National Capital Commission, administrating federal properties in the region around Ottawa, Ontario and Gatineau/Hull, QC
 * Council of Churches in Namibia, an organization representing a number of Christian churches in Namibia
 * County Councils Network - the network of County Councils in England
 * Clubul de Cicloturism Napoca - "Napoca" Cycling Club - Romanian cycling, civic and ecological association

Other uses

 * Comedy Central News: A TV show on the Dutch Comedy Central
 * Community Computing Network an early on line community
 * Complex Communication Needs
 * Concours Complet National: a national eventing competition