| S/NO | Abbr. | Meaning |
| 1 | BN | Bachelor of Nursing |
| 2 | BN | Backbone Network |
| 3 | BN | Background Noise |
| 4 | BN | Ballistic Number (w/CDA) |
| 5 | BN | Banaadir (postal region, Somalia) |
| 6 | BN | Banco Nacional (Costa Rican National Bank) |
| 7 | BN | Bandai Namco (gaming magazine) |
| 8 | BN | Bangladesh Navy |
| 9 | BN | Bank Note |
| 10 | BN | Barisan National (National Front, Malaysia) |
| 11 | BN | Barnes and Noble (Internet) |
| 12 | BN | Baron |
| 13 | BN | Battalion |
| 14 | BN | Battle Net (gaming server) |
| 15 | BN | Be Nice |
| 16 | BN | Beacon |
| 17 | BN | Beam Number |
| 18 | BN | Bechtel, Nevada |
| 19 | BN | Beer Nut |
| 20 | BN | Before Noon |
| 21 | BN | Before Note |
| 22 | BN | Behavioral Neuroscience (psychology) |
| 23 | BN | Bekende Nederlander (Dutch) |
| 24 | BN | Benevento, Campania (Italian province) |
| 25 | BN | Benin |
| 26 | Bn | Benzyl group (chemistry) |
| 27 | B/N | Between |
| 28 | BN | Between (logging abbreviation) |
| 29 | BN | Biblioteca Nacional (Brazil) |
| 30 | BN | Bibliothèque Nationale (French: National Library) |
| 31 | BN | Big Noob (gaming) |
| 32 | BN | Billing Number |
| 33 | BN | Billion |
| 34 | BN | Binary Number |
| 35 | BN | Bio Nightmare (game) |
| 36 | BN | Biscuiterie Nantaise (confectionary company) |
| 37 | BN | Blackmore’s Night (band) |
| 38 | BN | Block Number |
| 39 | BN | Boardnation.com (website) |
| 40 | BN | Bobliotheque Nationale (Paris) |
| 41 | B/N | Bombardier/Navigator |
| 42 | BN | Bombardier/Navigator |
| 43 | BN | Bonn (Bonn, Germany) |
| 44 | BN | Border Node |
| 45 | BN | Boron Nitride |
| 46 | BN | Bossa Nova |
| 47 | BN | Boundary Neutral |
| 48 | BN | Boycott Novell (blog) |
| 49 | BN | Bradley Nowell (late lead singer for Sublime) |
| 50 | BN | Brand New (band) |
| 51 | BN | Braniff International Airways (1928-1992) |
| 52 | BN | Bridge Number (IEEE) |
| 53 | BN | Brief Nudity (TV rating) |
| 54 | BN | Briefing Note |
| 55 | BN | Brighton (UK postal code) |
| 56 | BN | Britten-Norman (aircraft manufacturer; UK) |
| 57 | BN | Broadband Network |
| 58 | BN | Broadcast News |
| 59 | BN | Broadcast Number |
| 60 | BN | Brown Norway (rat breed) |
| 61 | BN | Brunei (top level domain name) |
| 62 | BN | Brushed Nickel (bathroom fixtures) |
| 63 | BN | Buffalo News (newspaper) |
| 64 | BN | Bulimia Nervosa |
| 65 | BN | Bureau of Narcotics |
| 66 | BN | Burlington Northern (railroad) |
| 67 | BN | Business Number (Canada) |
| 68 | BN | But Not …. |
| 69 | BN | Notaire Bernois (French) |
| 70 | BN | The Birmingham News (newspaper) |