| Acronym | Definition |
|---|
| NSIS➣Next Steps in Signaling |
| NSIS➣Null Soft Based Installer |
| NSIS➣Nullsoft Scriptable Installer System |
| NSIS➣Nuovo Sistema Informativo Sanitario (Italian: New Health Information System) |
| NSIS➣Nullsoft Scriptable Install System |
| NSIS➣No Such Interface Supported (computing) |
| NSIS➣North Strabane Intermediate School (Pennsylvania) |
| NSIS➣National Sheep Identification System (Ireland) |
| NSIS➣Nullsoft SuperPimp Install System |
| NSIS➣North Snohomish, Island and Skagit |
| NSIS➣Nationaal Schengen Informatie Systeem (Dutch, Schengen area police computer system) |
| NSIS➣New Student Information System |
| NSIS➣National Security Investigation Section (Canada) |
| NSIS➣North Shore Immigration Service Limited (New Zealand) |
| NSIS➣Nordevald Software & Information Services |
| NSIS➣NASA Software Information System |
| NSIS➣North Sumter Intermediate School |