| Acronym | Definition |
|---|
| NSF | National Science Foundation |
| NSF | Non Sufficient Funds |
| NSF | Not Sufficient Funds (return check reason code) |
| NSF | Norsk Sykepleierforbund (Norwegian Nurses League) |
| NSF | N-Ethylmaleimide-Sensitive Factor (aka N-Ethylmaleimide-Sensitive Fusion Protein) |
| NSF | Nationalsocialistisk Front (Swedish neo-Nazi political party) |
| NSF | Norges Speiderforbund (Norwegian: Norwegian Scout Association) |
| NSF | Norges Seilforbund (Norway) |
| NSF | Nederlandse Sport Federatie |
| NSF | Notes Storage Facility (Lotus Notes) |
| NSF | Norges Sjakkforbund (Norwegian Chess Association) |
| NSF | Norges Svømmeforbund (Norwegian Swimming Federation) |
| NSF | Near Side Front (automotive suspension) |
| NSF | Norsk Sjømannsforbund (Norwegian Sailors League) |
| NSF | Naga Students' Federation (UK) |
| NSF | Network Specific Facility (ISDN) |
| NSF | Name Search File |
| NSF | Nintendo Sound File |
| NSF | Norsk Sveiseteknisk Forbund (Norwegian Association for Welding Engineering) |
| NSF | Nuclear Structure Facility (Daresbury Laboratory, Cheshire, UK, now closed; |
| NSF | National Secessionist Forces (gaming) |
| NSF | Norsk Selvhjelpsforum (Norwegian Self-help Forum) |
| NSF | Norsk Statistisk Forening (Norwegian Statistical Society) |
| NSF | Navy Stock Fund |
| NSF | Norsk Sosiologforening (Norwegian Association of Sociologists) |
| NSF | Name Search Facility |
| NSF | Northwest Secessionist Forces (Deus-Ex game) |
| NSF | North Shore Frogmen (Beverly, Massacusetts scuba club) |
| NSF | Nederlandse Strandzeil Federatie |
| NSF | Norsk Statsvitenskapelig Forening (Norway) |
| NSF | Norsk Speider Forbund (Norwegian Scout Association) |
| NSF | Norway, Sweden, Finland (in order, left to right) |
| NSF | Not So Fast |
| NSF | National Sports Festival |
| NSF | Non-Standard Facilities |
| NSF | Non-Stock Fund |
| NSF | Norges Standardiseringsforbund |
| NSF | National Sanitation Foundation |
| NSF | National Schizophrenia Fellowship (UK) |
| NSF | National Service Framework (Department of Health UK) |
| NSF | National Sleep Foundation |
| NSF | National Stakeholders Forum |
| NSF | National Standard Format |
| NSF | Naval Support Facility |
| NSF | Nephrogenic Systemic Fibrosis |
| NSF | New Student Forum |
| NSF | No Significant Findings |
| NSF | Non-Stop Forwarding |
| NSF | Not Safe For |
| NSF | North South Foundation (est. 1989) |
| NSF | Neighborhood Street Fund (Seattle, WA) |
| NSF | National Sports Foundation |
| NSF | Nuclear Storage Facility |
| NSF | National Security Forum |
| NSF | National Storytelling Festival |
| NSF | Net Square Foot |
| NSF | National Service Full-Time (Singapore conscription) |
| NSF | National Strike Force (US Coast Guard) |
| NSF | Naval Surface Fire |
| NSF | NES (Nintendo Entertainment System) Sound File (file extension) |
| NSF | National Sport Federation (Canada) |
| NSF | Natural Selection Foods LLC (San Juan Bautista, California) |
| NSF | National Sanitation Foundation International (Ann Arbor, MI) |
| NSF | Needy Student Fund |