CRN

• CRN International, an American radio marketing company
• CRN S.p.A, a luxury yacht brand owned by the Ferretti Group
• Cornell Companies, a defunct American private prison company
• Congress Rental Network, an audiovisual technology trade association
• Council for Responsible Nutrition, an American dietary supplement trade association

• CRN (magazine), an American technology trade magazine
• CRN Digital Talk Radio Networks, an American radio network
• Calvary Radio Network, a radio station network in the United States
• Community Radio Network (Australia), a radio program distributor
• Community Radio Network (New Zealand), a radio network

• National Reconciliation Committee (Comité de réconciliation nationale), a Malagasy political coalition founded by Albert Zafy
• National Reconciliation Council (Niger) (Conseil de réconciliation nationale), a governing body during the Fourth Republic of Niger
• National Revolutionary Committee (Comité Revolucionario Nacional), a participant in the Jaca uprising in Spain

• CrN, a lattice constant in physics
• Chemical reaction network, in mathematical chemistry
• Chromium nitride, a chemical compound
• Common Random Numbers, a statistical procedure
• Concentration ratio, a measure of market concentration in economics
• Cross-polytope of n-dimensions, in geometry
• US Climate Reference Network, a network of climate stations in the United States
• Neurosciences Research Center (Centre de recherche en neurosciences), a research organization at Université Laval, Québec, Canada

• CRN 91 Naval Gun, an Indian naval autocannon
• AN/CRN, a series of United States military radio transmitters
• Cognos ReportNet, business intelligence software

• Community Rail Network, a British rail association
• Country Regional Network, a rail network in New South Wales, Australia
• CRN, the Amtrak code for Creston (Amtrak station), Iowa, US
• CRN, the ICAO code for Aero Caribbean, merged into Cubana in 2015
• CRN, the ICAO code for Carson Air Ltd, a Canadian air ambulance operator
• CRN, the National Rail code for Crowthorne railway station, Berkshire, UK
• CRN, the reporting mark for the Carolina and Northwestern Railway, US

• Canadian Registration Number, in Canadian boiler safety regulation
• Certified Radiologic Nurse, a nursing certification
• Chinese Rainbow Network, an LGBT-related organization in China
• Conflict Risk Network, a program of the defunct Genocide Intervention Network
• Cora language, an indigenous language of Mexico

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