| Abbreviation | Definition |
|---|---|
| NACP | National Archives, College Park |
| NAHRS | Nursing and Allied Health Resources Section |
| NAL | Natio Agricultural Library |
| NAL | New American Library |
| NALIS | National Library and Information System Authority |
| NALISE | National Association of Library and Information Science Educators |
| NALT | National Agricultural Library Thesaurus |
| NAPL | National Air Photo Library |
| NASIG | North American Serials Interest Group |
| NAVL | Network Application Visibility Library |
| NBDL | National Biodiversity DNA Library |
| NBLF | New Brunswick Libraries Faculty |
| NBLF | New Brunswick Library Faculty |
| NBLF | North Brunswick Library Foundation |
| NCCL | NVIDIA Collective Communication Library |
| NCCL | NVIDIA Collective Communications Library |
| NCDL | North Carolina Digital Library |
| NCDL | Northern California Digital Library |
| NCL | National Central Library |
| NCLA | Nassau County Library Association |