| Acronym | Definition |
|---|
| NIS | Norton Internet Security (Symantec software) |
| NIS | Newly Independent States |
| NIS | Naval Investigative Service |
| NIS | Network Information Service (aka Yellow Pages) |
| NIS | Nationwide Inpatient Sample |
| NIS | Network Information Services |
| NIS | New Independent States |
| NIS | Network Information System |
| NIS | New Israeli Shekel (currency in Israel) |
| NIS | Nippon Ichi Software |
| NIS | Nuova Italia Scientifica (Italian: New Scientific Italy; book) |
| NIS | National Intelligence Service (various countries) |
| NIS | Near-Infrared Spectrometer |
| NIS | National Immunization Survey |
| NIS | Sodium Iodide Symporter |
| NIS | National Insurance Services (Brookfield, WI) |
| NIS | National Incidence Study (child abuse; US DHHS) |
| NIS | National Integrity System (anti-corruption) |
| NIS | Non-Interventional Study (pharmaceutical development) |
| NIS | Network Infrastructure Services |
| NIS | Namo Image Slicer |
| NIS | Network Information Service |
| NIS | Network Interconnection Service |
| NIS | Norton Internet Security |
| NIS | National Institutes of Statistics (various locations) |
| NIS | National Indicator Set (UK) |
| NIS | National Intelligence Survey |
| NIS | Nagoya International School (est. 1964; Japan) |
| NIS | Negative Ion Source |
| NIS | Nuclear Information Service (UK) |
| NIS | National Institute of Sports (India) |
| NIS | Norwegian International School (Hong Kong) |
| NIS | National Indoor Stadium (Beijing, China) |
| NIS | Navigation Information Service (US DoT) |
| NIS | National Intelligence Strategy |
| NIS | National Intelligence System (police incident code; New Zealand) |
| NIS | Normally in Stock (merchandise) |
| NIS | Not In Stock |
| NIS | National Information System |
| NIS | Nigeria Immigration Service |
| NIS | Not in Service |
| NIS | Neighborhood Improvement Services (various locations) |
| NIS | National Information Service (various countries) |
| NIS | National Identity Scheme (UK) |
| NIS | Norsk Internasjonalt Skipsregister (Norwegian International Ship Registery) |
| NIS | Non-Intrinsically Safe |
| NIS | National Industry Standards (housing) |
| NIS | New Incentive Scheme |
| NIS | Nishimachi International School (Tokyo, Japan) |
| NIS | Network Infrastructure Solutions |
| NIS | National Insurance System |
| NIS | Nonproliferation and International Security division (US DOE) |
| NIS | Normal Metal-Insulator-Superconductor (aka Superconductor-Insulator-Normal Metal) |
| NIS | NATO Identification System |
| NIS | Non-Interactive Sequence (gaming) |
| NIS | National Implementation Strategy |
| NIS | National Intelligence System |
| NIS | Nuclear Instrumentation System |
| NIS | National Improvement Strategy (UK) |
| NIS | Non-Proliferation and International Security |
| NIS | National Input Segment |
| NIS | Naval Inspection Service (US Navy) |
| NIS | Neurological Impairment Scale |
| NIS | Net Income Statement (finance) |
| NIS | NATO International Staff |
| NIS | National Insurance Specialists |
| NIS | Neighborhood Improvement Strategy |
| NIS | National Integration Services (touchscreen manufacturer) |
| NIS | Noise Information System |
| NIS | New Immigrant Study |
| NIS | Network Integrity Services Ltd (Stockport, Cheshire, UK) |
| NIS | National Imagery System |
| NIS | NIMA Information Service |
| NIS | NMCS (Non-Mission Capable Status) Information System (US DoD) |
| NIS | National Interdepartmental Seminar |
| NIS | Non-Invasive Sampling |
| NIS | Nestlé Investor Seminar |
| NIS | Net Interest Spreads |
| NIS | Negotiation Information System |
| NIS | Networked Information Storage |
| NIS | Nitrogen Inerting System (military aviation, fuel subsystem) |
| NIS | Nonprofit Insurance Services (Hanover, PA) |