| ISPB | Icelandic Society for the Protection of Birds 
| Others |
| ISPB | Illinois Society for the Prevention of Blindness
| Others |
| ISPB | Indian Society of Plant Breeders
| Others |
| ISPB | Information Services Policy Board
| Others |
| ISPB | Institut des Sciences
| Others |
| ISPB | Institut des Sciences Pharmaceutiques et Biologiques
| Others |
| ISPB | International Society for Plasmid Biology
| Others |
| ISPB | Interpersoonlijke Sociaal Psychiatrische Begeleiding
| Others |
| ISPB | Iowa Soybean Promotion Board
| Others |