| 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 |