| Acronym | Definition |
|---|
| REI➣Recreational Equipment, Inc. |
| REI➣Real Estate Investment |
| REI➣Real Estate Investing |
| REI➣Restricted Entry Interval (pesticides) |
| REI➣Ricoh Electronics, Inc. (Tustin, CA) |
| REI➣Real Estate Institute (various locations) |
| REI➣Research and Educational Institute (various organizations) |
| REI➣Recommended Exposure Index (camera feature) |
| REI➣Renewable Energy Initiative |
| REI➣Reproductive Endocrinology and Infertility |
| REI➣Reset Indication |
| REI➣Remote Error Indicator |
| REI➣Request for Expressions of Interest |
| REI➣Reykjavik Energy Invest (Iceland) |
| REI➣Rosendin Electric, Inc. (various locations) |
| REI➣Real Economic Impact (tour; various locations) |
| REI➣Régiment Etranger d'Infanterie (French: Foreign Infantry Regiment) |
| REI➣Revue d'Economie Industrielle (French: Journal of Industrial Economics) |
| REI➣Research, Evaluation and Information (various organizations) |
| REI➣Reentry Interval |
| REI➣Reliant Energy, Inc. |
| REI➣Remote Error Indication |
| REI➣Research Engineers International |
| REI➣Ross Eye Institute (Buffalo, NY) |
| REI➣Ripple Effects Interactive (Pittsburgh, PA) |
| REI➣Recherche Exploratoire et Innovation (French: Exploratory Research and Innovation) |
| REI➣Recursos Electrónicos de Información (Spanish) |
| REI➣Real Estate Innovator |
| REI➣Réseau Economie Internationale (French: International Economics Network; Canada) |
| REI➣Radio España Independiente (Spanish: Radio Free Spain) |
| REI➣Recognition Equipment Incorporated |
| REI➣Request for Engineering Information |
| REI➣Renewable Energy Island |
| REI➣Rad Elec Inc. |
| REI➣Rapid Enzymatic Indicator |
| REI➣Rotating Equipment Initiative |
| REI➣Recovered Energy Inc (Pocatello, ID) |
| REI➣Research Equipment Incorporated |