| Acronym | Definition |
|---|
| NAI➣Network Advertising Initiative |
| NAI➣Netherlands Architecture Institute |
| NAI➣Nordic Africa Institute |
| NAI➣New and Improved |
| NAI➣Sodium Iodide |
| NAI➣Network Access Identifier (Wireless IP Network Architecture) |
| NAI➣NASA Astrobiology Institute |
| NAI➣Network Associates, Inc. |
| NAI➣No Adverse Impact (flood mitigation) |
| NAI➣North American Indian (language) |
| NAI➣Network Application Interface |
| NAI➣Network Access Interrupt |
| NAI➣Network Access Identifier |
| NAI➣Network Associates Inc. |
| NAI➣Norwegian Air International (Dublin, Ireland, UK) |
| NAI➣Non-Accidental Injury (healthcare) |
| NAI➣Named Area of Interest |
| NAI➣Notifiable Avian Influenza (surveillance system) |
| NAI➣No Action Indicated (US FDA) |
| NAI➣New Americans Initiative (various organizations) |
| NAI➣New Age Industrial (Morton, KS) |
| NAI➣New America International |
| NAI➣Nachrichten Aus Israel |
| NAI➣North American Initiative |
| NAI➣National Aerospace Initiative |
| NAI➣National Associates, Inc. |
| NAI➣News America Incorporated (Delaware) |
| NAI➣New Africa Investments (South Africa) |
| NAI➣New Asia Industries (Vietnam) |
| NAI➣Nature of Address Indicator (SS7 SCCP) |
| NAI➣National Assessment Institute, Inc. (testing and certification service) |
| NAI➣No Advice Intended |
| NAI➣No Artificial Ingredients (book) |
| NAI➣Nürnberger Altersinventar |
| NAI➣Network Application Integration |
| NAI➣Nacelle Anti-Ice (aviation) |
| NAI➣Northwest Avalanche Institute |
| NAI➣Neutral Atom Imager |
| NAI➣NATO Analog Interface (connects NATO analog signal equipment to the MSE/DGM network) |
| NAI➣Nic Augustus Investigations (Baltimore, MD) |
| NAI➣Naval Ammunition Interchangeability |
| NAI➣North American Inks |
| NAI➣Nuclear Accident or Incident |
| NAI➣National Account Index |
| NAI➣Network Applications Incorporated |
| NAI➣Network Access Index |
| NAI➣Number of Active Ingredients (pharmaceutical industry) |
| NAI➣Neuraminidase Activity Inhibition |
| NAI➣No Airborne Intercept |
| NAI➣Navy Action Item |
| NAI➣Network Application Installer |
| NAI➣Nigerian Association Ireland (est. 2005) |
| NAI➣Numerof and Associates, Inc. (Saint Louis, MO) |