NACIS
| Acronym | Definition |
|---|---|
| NACIS | North American Cartographic Information Society (founded in 1980; Milwaukee, WI) |
| NACIS | National Adult Compact Information System (various locations) |
| NACIS | National Association of Citizens Information Services (Ireland) |
| NACIS | Navy Air Control & Identification System |
| NACIS | Naval Avionics Center Information System |