| Acronym | Definition |
|---|
| NMI | No Middle Initial |
| NMI | NSF (National Science Foundation) Middleware Initiative |
| NMI | Nautical Mile |
| NMI | Nissan Motor Indonesia |
| NMI | Nova Measuring Instruments (various locations) |
| NMI | Non-Maskable Interrupt |
| NMI | Northern Mariana Islands |
| NMI | National Measurement Institute (Australia) |
| NMI | Natural Marketing Institute |
| NMI | Nederlands Mediation Instituut (Dutch: Dutch Mediation Institute) |
| NMI | Network Management Interface |
| NMI | Need More Info |
| NMI | Nazarene Missions International (Church of the Nazarene) |
| NMI | Novo Millennio Ineunte (apostolic letter; Catholic Church) |
| NMI | Non-Manufacturing Index (statistic) |
| NMI | Native Method Interface |
| NMI | New Message Indication |
| NMI | New Model Introduction |
| NMI | Non Maskable Interrupt |
| NMI | Network Merchants, Inc. (payment gateway) |
| NMI | Needle Magic, Inc. (stitching) |
| NMI | New Media Institute (various organizations) |
| NMI | Norwegian Meteorological Institute (Norway) |
| NMI | Net Monthly Income |
| NMI | National Metering Identifier (Australia) |
| NMI | Nuclear Medicine Imaging |
| NMI | National Museum of Iran (Tehran, Iran) |
| NMI | National Microelectronics Institute (UK) |
| NMI | Nordafrika Mittelost Initiative (German: North Africa Middle East Initiative) |
| NMI | National Military Intelligence |
| NMI | Normalized Mutual Information |
| NMI | National Monuments and Icons |
| NMI | Nuclear Medicine Institute (University of Findlay; Findlay, OH) |
| NMI | NASA Management Instruction |
| NMI | Neuro-Muscular Incapacitation |
| NMI | National Maglev Initiative |
| NMI | New Mexico Independent (news network) |
| NMI | Nasyid Minggu Ini (Malaysian: Nasyid Award Week) |
| NMI | Near Miss Incident |
| NMI | Non-Medicinal Ingredient |
| NMI | Number of Module Instances |
| NMI | NovaStar Mortgage, Inc. (NovaStar Financial, Inc.) |
| NMI | Native Method Interface (computing) |
| NMI | N-Methylimidazole |
| NMI | National Meteorology Institute |
| NMI | Non Metallic Inclusions (steel industry) |
| NMI | National Maritime Institute |
| NMI | No Malice Intended (band) |
| NMI | Number of Methods Inherited |
| NMI | New Monastic Individual |
| NMI | Normalized Moment of Inertia |
| NMI | Neuromagnetic Imaging |
| NMI | No Message Included (used in subject of message to indicate nothing is in the body of the message) |
| NMI | Non-Major Item |
| NMI | Norwest Mortgage Incorporated |