BSN

BSN is a three-letter abbreviation that may refer to:

• A Non-profit Biotechnology Organization, Biotechnology Society of Nepal
• Badan Standardisasi Nasional or National Standardization Agency of Indonesia
• A fitness supplement company, Bio-Engineered Supplements & Nutrition
• Baloncesto Superior Nacional, basketball league in Puerto Rico
• Bank Simpanan Nasional, the government-owned bank in Malaysia
• The French food and beverage company Boussois-Souchon-Neuvesel (Groupe Danone since 1994)
• Bachelor of Science in Nursing
• Bassoon
• Bluestare Networks
• Blue Square North, the second-highest level of non-league football in England
• Body sensor network
• Burgerservicenummer
• A school, The British School in the Netherlands