| Abbreviation | Definition |
|---|---|
| ISAL | International Society for Artificial Life |
| ISAL | International Society of Artificial Life |
| ISAM | International Society of Addiction Medicine |
| ISAM | International Society of Aerosols in Medicine |
| ISAN | International Society for Autonomic Neuroscience |
| ISAN | International Society of Autonomic Neuroscience |
| ISAO | International Society for Artificial Organs |
| ISAO | International Society of Arboriculture Ontario |
| ISAP | International Society for Anaesthetic Pharmacology |
| ISAP | International Society for Asphalt Pavements |
| ISAP | International Society for Aviation Photography |
| ISAP | International Society of Acrylic Painters |
| ISAP | International Society of Applied Psychoanalysis |
| ISAP | International Society of Aviation Photographers |
| ISAR | Indian Society For Assisted Reproduction |
| ISAR | International Society for Aeolian Research |
| ISAR | International Society for Animal Rights |
| ISAR | International Society for Animal Rights International Society for |
| ISAR | International Society for Auricular Reconstruction |
| ISAR | International Society of Arthroplasty Registries |