| Abbreviation | Definition |
|---|---|
| NKFL | North Kingstown Free Library |
| NLA | National Library of Australia |
| NLA | Nebraska Library Association |
| NLAC | NOAA Libraries Advisory Committee |
| NLAP | Navigator Library Access Project |
| NLB | National Library Board |
| NLB | National Library for the Blind |
| NLB | National Library of Bhutan |
| NLB | Nevron library binary |
| NLC | National Library Of Canada |
| NLC | National Library of China |
| NLC | Nebraska Library Commission |
| NLC | Northland Library Cooperative |
| NLCB | National Library of Canada Bibliography |
| NLCL | North Liberty Community Library |
| NLCL | North Lincolnshire Central Library |
| NLCL | North Logan City Library |
| NLE | National Library for the Environment |
| NLE | National Library of Energy |
| NLH | National Library for Health |