| Abbreviation | Definition |
|---|---|
| BOPA | Belize Offshore Practitioners Association |
| BOSSA | Beijing Overseas Study Service Association |
| BOSTA | Belgian Office and Stationary Trade Association |
| BOSTA | Belgian Office and Stationery Trade Association |
| BOSTA | British Orthopaedic Sports Trauma Association |
| BOTA | Belgian Orthopaedic Trauma Association |
| BOTNA | Buddies of the Ninth Association (UK) |
| BPA | Baseball Players Association |
| BPA | British Paralympic Association |
| BPA | British Psychoanalytic Association |
| BPAA | Battle Point Astronomical Association |
| BPAA | Bristol Property Agents Association |
| BPAP | Business Process Association of the Philippines |
| BPCA | Bangladeshi Parents and Carers Association |
| BPCA | British Pest Control Association |
| BPCA | Business Products Credit Association |
| BPEA | Beijing Private Equity Association |
| BPEA | Bill Prankard Evangelistic Association |
| BPF | British Plastics Federation |
| BPG | Bell Pensioners' Group |