| Acronym | Definition |
|---|
| CRN | Crown |
| CRN | Crane |
| CRN | Cornish (SIL code, UK) |
| CRN | Clinical Research Network (UK) |
| CRN | Chromium Nitride |
| CRN | Council for Responsible Nutrition |
| CRN | Cognitive Radio Network (wireless communication system) |
| CRN | Creston (Amtrak station code; Creston, IA) |
| CRN | Computer Reseller News |
| CRN | Certified Registered Nurse |
| CRN | Customer Reference Number |
| CRN | Collaborative Research Network (IAI) |
| CRN | Canadian Registration Number |
| CRN | Cooperative Research Network |
| CRN | Climate Reference Network |
| CRN | Course Registration Number (college) |
| CRN | Compare with Random Number |
| CRN | Chinese Restaurant News |
| CRN | Career Resource Network |
| CRN | Center for Responsible Nanotechnology |
| CRN | Clinical Resource Nurse |
| CRN | Cable Radio Network |
| CRN | Course Reference Number |
| CRN | Community Recycling Network |
| CRN | Conflict Resolution Network |
| CRN | Children's Restoration Network |
| CRN | Cornell Companies, Inc (stock symbol) |
| CRN | Controlled Release Nitrogen |
| CRN | Common Random Number |
| CRN | Cartoonists Rights Network |
| CRN | College Radio Network |
| CRN | Chicago Rehab Network |
| CRN | Community Rehabilitation Network |
| CRN | Cellular Radio Network |
| CRN | Countryside Recreation Network |
| CRN | Commission Régionale de la Naissance (French: Regional Birth Commission; pregnancy forum) |
| CRN | Centres de Ressources Numériques (French: Digital Resource Center) |
| CRN | Council on Renal Nutrition |
| CRN | Community Response Network (various locations) |
| CRN | Congress Rental Network |
| CRN | Credit Reference Number (US IRS) |
| CRN | Christmas Rock Night |
| CRN | Connecticut Radio Network |
| CRN | Cristo Rey Network (Chicago, IL) |
| CRN | Case Report Number |
| CRN | Consumer Resource Network |
| CRN | Cosmic Radio Noise |
| CRN | Court Reporting Network |
| CRN | Customer Restoration Network (insurance) |
| CRN | Current Return Network |
| CRN | Change Request Notice |
| CRN | Correctional Registered Nurse |
| CRN | Closed Restricted Network (cyber security) |
| CRN | Caisse de Retraite des Notaires |
| CRN | Cumann Rince Naisiunta |
| CRN | Custom Register Number (shipping) |
| CRN | Centre for Research in Neuroscience |
| CRN | Coding and Reimbursement Network |
| CRN | Club Renault Norvege |
| CRN | City Radio Network |
| CRN | Crime Reduction News |
| CRN | Charities Resource Network |
| CRN | Certified Radiology Nurse |
| CRN | Community Recovery Network |
| CRN | Children's Residential Network |
| CRN | Computer Random Numbering |
| CRN | Contact Reference Number |
| CRN | Computer Research News |
| CRN | Contract Revision Number |
| CRN | Chicagoland Radiological Network |
| CRN | Comparative Research Networks |
| CRN | Cable Routing Rotation (NASA) |
| CRN | Combat Radio Net |
| CRN | Customer Relations Network (various companies) |
| CRN | Can't Remember Nuttin |
| CRN | Custom Rehab Network |
| CRN | Critical Ranking Number |
| CRN | Canary Islands Radio Networks |
| CRN | Carbon Reinforced Nylon |
| CRN | Contingency Radio Net |
| CRN | Central Riddle Network (website) |
| CRN | Committed Rate Network |
| CRN | Creative Research Network |
| CRN | Carolina and North Western Railway Company |