| Abbreviation | Definition |
|---|---|
| BFCU | Beulah Federal Credit Union |
| BFFB | Brotherhood Forever, Forever Brotherhood |
| BFTU | Botswana Federation of Trade Unions |
| BFU | Bulgarian Football Union |
| BFUHS | Bellows Falls Union High School |
| BGSU | Biochemistry Graduate Student Union |
| BGWU | Bank and General Workers Union |
| BHCU | Boeing Helicopters Credit Union |
| BICU | Bradley Initiative Credit Union |
| BIFAWU | Banking Insurance Finance and Allied Workers Union |
| BIFAWU | Banking Insurance Finance and Assuance Workers Union |
| BIFAWU | Banking Insurance Finance and Assurance Workers union |
| BIFAWU | Banking, Insurance,Finance and Allied Workers Union |
| BIFU | Banking Insurance and Finance Union |
| BIFU | Banking, Insurance and Finance Union |
| BIGWU | Bankers Insurance and General Workers Union |
| BIGWU | Banking Industrial and General Workers Union |
| BIGWU | Banking Insurance and General Workers Union |
| BIIU | Business Intelligence International Union |
| BITU | Belarussian Independent Trade Union |