| NABL | National Accreditation Board for Laboratories 
| Others |
| NABL | National Accreditation Board for Testing and Calibration Laboratories
| Others |
| NABL | National Ag Based Lubricants
| Others |
| NABL | National Alliance of Basketball Leagues
| Others |
| NABL | National Association of Bond Lawyers
| Others |
| NABL | National Athletic Basketball League
| Others |
| NABL | Native Alaskan Business Leaders
| Others |
| NABL | North American Baseball League
| Others |
| NABL | North American Basketball League
| Others |
| NABL | Northeast Adult Baseball League
| Others |