| BIRS | Banca Internazionale per la Ricostruzione e lo Sviluppo (Italian) | 国际银行（意大利语） |
| BIRS | Banff International Research Station (Canada) | 班夫国际研究站（加拿大） |
| BIRS | Battlefield Information Reporting System | 战场信息报告系统 |
| BIRS | Basic Indexing and Retrieval System | 基本索引和检索系统 |