| NBAC | National Bank of Adams County 
| Others |
| NBAC | National Bioethics Advisory Commision
| Others |
| NBAC | National Bioethics Advisory Commission
| Others |
| NBAC | National Bioethics Advisory Council
| Others |
| NBAC | National Breastfeeding Awareness Campaign
| Others |
| NBAC | National Bullying Awareness Campaign
| Others |
| NBAC | National Business Association for Chiropractors
| Others |
| NBAC | Network Based Application Control
| Others |
| NBAC | Neuroscience Bishop Award for Conferences
| Others |
| NBAC | Newport Beach Athletic Club
| Others |
| NBAC | Newsmen Basketball Association of Cebu
| Others |
| NBAC | Noel Butlin Archives Centre, Australian National University
| Others |
| NBAC | Non-Blocking Atomic Commit
| Others |
| NBAC | North Baltimore Aquatic Club
| Others |