| Acronym | Definition |
|---|
| RII➣Risk Informed Inspection |
| RII➣Routing Information Identifier |
| RII➣Revue de l'Ingénieur Industriel (French: Journal of Industrial Engineering; Belgium) |
| RII➣Routing Information Indicator |
| RII➣Remote Ignition Interrupter (monster truck emergency power switch) |
| RII➣Relevant Information and Intelligence |
| RII➣Required Inspection Item (FAA) |
| RII➣Request for Intelligence Information |
| RII➣Registro de Industrias Integradas (Spanish: Registration Integrated Industries) |
| RII➣Reform of International Institutions |
| RII➣Reinvestment & Infrastructure Initiative |
| RII➣Required Item Inspection (aviation; FAA) |
| RII➣Required Item Installation |
| RII➣Réseau International des Ingénieurs (French: International Network of Engineers) |
| RII➣Robinsons Inn, Inc. |
| RII➣Reactive Infiltration Instability (geology) |
| RII➣Réseau International Immobilier (French: International Real Estate Network) |