| Abbreviation | Definition |
|---|---|
| IBF | International Basketball Federation |
| IBF | International Basketball Foundation |
| IBFL | Insee Basketball Fantasy League |
| IBL | International Basketball League |
| IBPA | Israeli Basketball Players Association |
| IBSA | International Basketball Sports Academy |
| ICBA | Inter County Basketball Association |
| ICBA | Inter-County Basketball Association |
| ICBL | Inter County Basketball League |
| IDBA | International Deaf Basketball Association |
| INBC | Indian Nation Basketball Conference |
| INBC | Indian Nations Basketball Conference |
| ISBL | Indian School Basketball League |
| ISBL | International Student Basketball League |
| IUBB | Indiana University Basketball |
| IUBC | Inter University Basketball Competition |
| IYB | Interior Youth Basketball |
| IYB | International Youth Basketball |
| JBL | Japan Basketball League |
| JBL | Junior Basketball League |