| Acronym | Definition |
|---|
| RSN | Recovery Support Network (various organizations) |
| RSN | Resort Sports Network |
| RSN | Reason |
| RSN | Real Soon Now |
| RSN | Red Sox Nation |
| RSN | Racing Sports Network (cars) |
| RSN | Regional Sports Network |
| RSN | Renal Support Network |
| RSN | Result Set Name |
| RSN | Remote Server Name |
| RSN | Robust Secure Network |
| RSN | Republic of Singapore Navy |
| RSN | Robust Security Network (802.11i standard) |
| RSN | Residual Soil Nitrogen (agriculture) |
| RSN | Robust Surface Navigation |
| RSN | Role Specialist Nation (US DoD) |
| RSN | Refuser Solidarity Network |
| RSN | Radio Salaam Namaste (Indian radio station; Irving, TX) |
| RSN | Rat Sciatic Nerve |
| RSN | Raytheon Services, Nevada (Las Vegas, Nevada) |
| RSN | Release Sequence Number |
| RSN | Réseau Sécurité Naissance (French: Birth Safety Network) |
| RSN | Regroupement pour la Surveillance du Nucléaire (French: Coalition for Nuclear Responsibility; Canada) |
| RSN | Remote Services Node |
| RSN | Record Serial Number |
| RSN | Road Safety Network |
| RSN | Role Specialization Nation (NATO) |
| RSN | R-Smart Network |
| RSN | Royal Swazi National Airways Corp, Swaziland (ICAO code) |
| RSN | Retraite Sportive Nogentaise (French senior citizen exercise association) |
| RSN | Reference Serial Number |
| RSN | Registered Surgical Nurse |
| RSN | Reference Symbol Number |
| RSN | Retrofit Service Notice (aviation) |
| RSN | Rotary Separation Nut |
| RSN | Radio Sorbonne Nouvelle (French college radio station; University of New Sorbonne; Paris, France) |
| RSN | Regional Service Node |
| RSN | Radioprotection et Sûreté Nucléaire (French: Nuclear Safety and Radiation Protection) |
| RSN | Residential Service Network |
| RSN | Règlement Relatif à la Sécurité des Navires (French: Ship Safety Regulations) |
| RSN | Readable Serial Number |