| BAA | Buy American Act |
| BAC | Budget and Administrative Committee (APEC) |
| BDV | Brussels Definition of Value |
| BEM | Big Emerging Market |
| BIA | Built-in agenda (World Trade Organization) |
| BIMP-EAGA | Brunei-Indonesia-Malaysia East ASEAN Growth Area |
| BISD | (GATT) Basic Instruments and Selected Documents |
| BIT | Bilateral Investment Treaty |
| BMN | Business Management Network (HRD WG) (APEC) |
| BOB | Balance of benefits |
| BOP | Balance of Payments |
| BOT | Balance of trade |
| BTN | Brussels Tariff Nomenclature |
| BTS | Basic telecommunications services |