MARIS
| Acronym | Definition |
|---|---|
| MARIS | Mississippi Automated Resource Information System |
| MARIS | Mid America Regional Information Systems (real estate; St. Louis, MO) |
| MARIS | Marine Information Service |
| MARIS | Multistate Aquatic Resources Information System |
| MARIS | Maritime Accident Response Information System (Nordic Council of Ministers) |
| MARIS | Maritime Activity and Risk Investigation System (Canadian Coast Guard) |