| Acronym | Definition |
|---|
| RAI➣Royal Anthropological Institute |
| RAI➣Resident Assessment Instrument |
| RAI➣Radio Televisione Italiana |
| RAI➣Radioactive Iodine |
| RAI➣Reynolds American Inc. |
| RAI➣Return As Is |
| RAI➣Robotics and Artificial Intelligence (various organizations) |
| RAI➣Remote Alarm Indication |
| RAI➣Rapid Application Integration |
| RAI➣Resource Availability Indication |
| RAI➣Remote Assistance Initiation |
| RAI➣Routing Area Identity |
| RAI➣Rico Auto Industries (India) |
| RAI➣Request for Additional Information |
| RAI➣Raised Air Intake (vehicles) |
| RAI➣Reliability Assurance Initiative (North American Electric Reliability Corporation) |
| RAI➣Ridgewood Art Institute (New Jersey) |
| RAI➣Radar Altimeter Indicator (avionics) |
| RAI➣Radio Audizioni Italiane |
| RAI➣Robert Allen Institute (Provo, UT) |
| RAI➣Recherche d'Agglutinines Irrégulières (French: Irregular Agglutinins Search) |
| RAI➣Research Activity Index (various schools) |
| RAI➣Registro de Aceptaciones Impagadas (Spanish) |
| RAI➣Registro Aeronautico Italiano (Italian Aircraft Registry) |
| RAI➣Resource Associates International (Spokane, WA) |
| RAI➣Risk Appetite Indicator (investing) |
| RAI➣Resource Availability Indicator (H.323 gateways) |
| RAI➣Routing Area Identification |
| RAI➣Random Access Iterator (computer programming) |
| RAI➣Republicans Abroad International |
| RAI➣Respiratory Arousal Index |
| RAI➣Research Institute for Aquaculture (Vietnam) |
| RAI➣Resultados Antes de Impostos (Portuguese: results before taxes) |
| RAI➣Regional Airspace Initiative |
| RAI➣Resource Adapter Interface |
| RAI➣Rural Alliance Inc (Shasta, CA) |
| RAI➣Rural Access Initiative |
| RAI➣Rules as Interpreted (gaming) |
| RAI➣Rah Ahane Iran (Iranian Railways) |
| RAI➣Radio and Allied Industries |
| RAI➣Request Arrival Interval |
| RAI➣Rural Area Interface |
| RAI➣Rangeless Airborne Instrumentation |
| RAI➣Research Access Incorporated |
| RAI➣Required Approach Interval (aviation) |
| RAI➣Recruit Alliance India (Hyderabad, India recruitment firm) |
| RAI➣Reconnaissance Attack Interface |
| RAI➣Readiness Assessment Instrument (various applications) |
| RAI➣Remote Altitude Indicator |
| RAI➣Random Access & Inquiry |
| RAI➣Reading and Arithmetic Indexes |