| Acronym | Definition |
|---|
| SNI | SMS (Short Message Service) Notification Indicator |
| SNI | Sistema Nacional de Investigadores (Mexico) |
| SNI | Serviço Nacional de Informações (National Information Service, Brazil) |
| SNI | Server Name Indication (networking protocol) |
| SNI | Standar Nasional Indonesia (Indonesian National Standard) |
| SNI | Société Nationale Immobilière (French: National Real Estate Company) |
| SNI | Sanity Not Included |
| SNI | Siemens Nixdorf Informationssysteme AG (Paderborn, Germany) |
| SNI | Subscriber Network Interface |
| SNI | San Nicolas Island (US Navy operated instrumentation site) |
| SNI | Syndicat National des Instituteurs (French: National Union of Teachers) |
| SNI | Shelter Now International (German religious and humanitarian group) |
| SNI | SNA Network Interconnection |
| SNI | Syndicat National de l'Isolation (French: National Insulation Union) |
| SNI | Service Node Interface |
| SNI | Sport Northern Ireland (UK) |
| SNI | Standard Network Interface |
| SNI | Sustainable National Income |
| SNI | Syndicat Neutre pour Indépendants (French: Neutral for Freelancers Union) |
| SNI | Service Network Interface |
| SNI | Signaling Network Interface |
| SNI | Secure Network Interface (web server) |
| SNI | Soviet Naval Infantry |
| SNI | Solidarites Nationales et Internationales (French: National and International Solidarity) |
| SNI | Secure Network Infrastructure |
| SNI | Shared Network Infrastructure |
| SNI | Società Numismatica Italiana (Italian Numismatic Society) |
| SNI | Shalom Network International |
| SNI | Sub-Network Independent |
| SNI | Schneider National Carriers, Inc. |
| SNI | Syndicat National Indépendant (French: National Independent Union) |
| SNI | SCC Network Interface |
| SNI | Senior Network, Incorporated |
| SNI | Signaling Network Interworking |
| SNI | Special Needs Inmate |
| SNI | Sistema Nacional de Interconexión (Guatemala) |
| SNI | Scripps Networks Interactive (lifestyle content) |
| SNI | Saline Nasal Irrigation (upper respiratory therapy) |
| SNI | Swedish Neuroscience Institute (Washington) |
| SNI | Sustaining Non-major Instrumentation (project) |
| SNI | System News, Inc. (Coral Springs, FL) |