| IBBA | Important Bird and Birding Area 
| Others |
| IBBA | Important Bird and Birding Areas
| Others |
| IBBA | Inland Bird Banding Association
| Others |
| IBBA | Integrated Behavioral and Biological Assessment
| Others |
| IBBA | International Bachelor of Business Administration
| Others |
| IBBA | International Black Belt Academy
| Others |
| IBBA | International Brangus Breeders Association
| Others |
| IBBA | International Business Broker's Association
| Others |
| IBBA | International Business Brokers Association
| Others |
| IBBA | International Butterfly Breeders Association
| Others |
| IBBA | Irving Boys Baseball Association
| Others |