NLM may stand for:
- National Liberation Movement
- NetWare Loadable Module, an add-in that can be downloaded with a network protocol
- Network Lock Manager, a computer communications protocol used with the NFS (Network File System)
- New Libertarian Manifesto, a treatise
- NLM CityHopper, a Dutch commuter airline and subsidiary of KLM
- Norwegian Lutheran Mission, a Christian missionary organization
- United States National Library of Medicine, a biomedical library in the United States and part of the National Institutes of Health