| Acronym | Definition |
|---|
| BEI | Banque Européenne d'Investissement (French: European Investment Bank; EU) |
| BEI | Banca Europea per gli Investimenti (Italian) |
| BEI | British Education Index |
| BEI | Banco Europeu de Investimento (Portuguese) |
| BEI | Biological Exposure Index (American Conference of Governmental Industrial Hygienists, Inc.) |
| BEI | Business Education Initiative |
| BEI | Bennett Environmental Inc. (Canada) |
| BEI | Behavioral Event Interview |
| BEI | Backscattered Electron Imaging (electron microscopy technique) |
| BEI | Business Education International (Nuremberg, Bavaria, Germany) |
| BEI | Bandai Entertainment, Inc. |
| BEI | Baseline Execution Index (military efficiency scale) |
| BEI | Beica, Ethiopia - Beica (Airport Code) |
| BEI | Biblioteca Enigmistica Italiana (Italian Library of Enigmatography) |
| BEI | Brownsburg Electronik Inc. (est. 1976; inductor and transformer manufacturer; Canada) |
| BEI | Bloch Enterprises Inc. (Newport News, VA) |
| BEI | Bulletin Electronique d'Informations (French: Electronic Information Bulletin) |
| BEI | Bridge Effectiveness Index |
| BEI | Butanol-Extractable Iodines |
| BEI | Biodiversity Education Initiative (University of New Hampshire) |
| BEI | Budget Enactment Instruction |
| BEI | Business Efficiency Initiative (UK) |
| BEI | Beaujolais Espace International (French hygiene products company) |
| BEI | Bridge Educação Internacional (Portuguese: Bridge Education International) |
| BEI | Beverly Enterprises, Inc. |
| BEI | Brykat Enterprises Inc (Wasaga Beach, ON, Canada) |
| BEI | Business Entity Identifier |