| Acronym | Definition |
|---|
| BSN | Bachelor of Science in Nursing |
| BSN | Body Sensor Networks |
| BSN | Boston (Massachusetts) |
| BSN | Broadcasting System of Niigata (Japan) |
| BSN | Badan Standardisasi Nasional (National Standardization Agency, Indonesia) |
| BSN | Bassoon |
| BSN | Breaking Social Norms (project) |
| BSN | Broadband Service Node |
| BSN | Backward Sequence Number |
| BSN | Bosch Smoke Number |
| BSN | Bank Simpanan Nasional (Malaysia) |
| BSN | Backward Sequence Number (SS7 MTP Layer 2) |
| BSN | Bureau du Service National (French: Office of National Service) |
| BSN | Boussois-Souchon-Neuvesel (French glass manufacturer) |
| BSN | Breastfeeding Support Network (various locations) |
| BSN | Brand Spanking New |
| BSN | British School in the Netherlands |
| BSN | Broadband Service Node (IP Networking) |
| BSN | Business Service Network (United States Postal Service) |
| BSN | Business Solutions Networking |
| BSN | Bio-Engineered Supplements & Nutrition |
| BSN | Block Sequence Number |
| BSN | Bureau de la Sécurité Nautique (French: Bureau of Boating Safety; Canada) |
| BSN | Brigade Subscriber Node (Army) |
| BSN | British Society for Neuroendocrinology |
| BSN | Board Serial Number |
| BSN | Block Shift Network |
| BSN | Bowel Sounds Normal |
| BSN | Batch Sequence Number |
| BSN | Beiersdorf, Smith and Nephew (Medical) |
| BSN | Britney Spears Now (fan website) |
| BSN | Battle Space Networking |
| BSN | BPX Service Node (Cisco) |
| BSN | Bearer Subnetwork |
| BSN | Back-End Storage Network |