| Acronym | Definition |
|---|
| NEF | New Economics Foundation (UK) |
| NEF | National Economic Forum (various locations) |
| NEF | New Energy Foundation (various locations) |
| NEF | Notarzteinsatzfahrzeug (German: Emergency Ambulance Vehicle; Germany and Austria) |
| NEF | Near East Foundation |
| NEF | Nikon Electronic Format |
| NEF | National Enrichment Facility (New Mexico) |
| NEF | New England Financial |
| NEF | National Empowerment Fund (Melrose North, South Africa) |
| NEF | National Equity Fund, Inc. (Local Initiatives Support Corporation) |
| NEF | Nursery Education Funding (UK) |
| NEF | Neurofilament |
| NEF | National Educational Foundation |
| NEF | New Europe Fund (various locations) |
| NEF | Noise Exposure Forecast (airports) |
| NEF | New Engine Family (vehicles) |
| NEF | Nikon Electronic File |
| NEF | Network of European Foundations for Innovative Cooperation |
| NEF | Naturist Education Foundation |
| NEF | New Era Fighting |
| NEF | New England Fishing |
| NEF | Neftekamsk (Russia) |
| NEF | National Emergency Fund |
| NEF | Nicht Erfüllt (Swiss military) |
| NEF | Not Even Funny |
| NEF | Neuro-Engagement Factor (marketing; Sands Research, Inc.) |
| NEF | Nouvelles Etudes Francophones (French: New Francophone Studies; journal) |
| NEF | Network Efficiency Factor |
| NEF | Naval Expeditionary Force |
| NEF | New Entrepreneur Forum |
| NEF | National Employment Fund (Cameroon) |
| NEF | Northeast Entrepreneur Fund (various locations) |
| NEF | New Enterprise Fund (finance) |
| NEF | National Exercise Evaluation Team (US FEMA) |
| NEF | Northeast Forum (online forum) |
| NEF | National Education Fund |
| NEF | Nonconventional Exploitation Factors |
| NEF | National Electricity Fund (India) |
| NEF | Noise Equivalent Flux |
| NEF | Nonessential Equipment and Furnishings (FAA program) |
| NEF | North-East Forest |
| NEF | Negative Exploitation Feedback |
| NEF | National Explosive Factory (UK) |
| NEF | Node-and-Edge Fault |
| NEF | National Environment Forum |
| NEF | No Further Clearance Required |
| NEF | New Energy Forum |
| NEF | Niagara Equestrian Festival (Canada) |
| NEF | Number of Eye Fixations |