CCN explained

CCN may refer to:

In science and technology

Cement chemist notation, developed to simplify the formulas used by cement chemists
Cereal cyst nematode, a plant disease
Corn cyst nematode, a plant disease
Cerebrocortical necrosis, a nutritional brain disease of cattle
Cloud condensation nuclei
Content centric networking, approach to computer-networking architecture
Controlled-Controlled Not Gate (also known as a Toffoli gate), a component of a reversible computer
Cyclomatic Complexity Number, a software metric
CYR61, CTGF, NOV, the first three proteins identified that belong to the "CCN" protein family - also see CCN intercellular signaling protein
Critical care nursing

Camino Cristiano Nicaragüense, a Nicaraguan political party
Caribbean Communications Network Ltd., a unit of ONE Caribbean Media Ltd. based in Trinidad and Tobago
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
Companhia Colonial de Navegação, a former Portuguese shipping company
Council of Churches in Namibia, an organization representing Christian churches in Namibia
County Councils Network, the network of County Councils in England
Covering Climate Now, a consortium of news organizations for news coverage of climate change

Comedy Central News, a TV show on the Dutch Comedy Central
Concours Complet National, a national eventing competition (see Concours Complet International)
Certified Clinical Nutritionist, see Nutritionist#United States
Railway service code for Central Coast & Newcastle Line, New South Wales, Australia
CMS Certification Number, a system for identifying healthcare providers in the United States