| Acronym | Definition |
|---|
| ISOP | International Student Orientation Program (various schools) |
| ISOP | International School of Paphos (Paphos, Cyprus) |
| ISOP | International Society of Pharmacovigilance |
| ISOP | Incentive Stock Option Plan |
| ISOP | International Society of Protistologists |
| ISOP | Infantile Scoliosis Outreach Program (Denver, CO) |
| ISOP | Invitation to Submit Outline Proposals (procurement term) |
| ISOP | Insurance Company of the State of Pennsylvania |
| ISOP | International Strategic Opportunities Program (Ministry of Economic Development and Innovation) |
| ISOP | International Symposium on Photochromism (conference) |
| ISOP | Irredundant Sum-Of-Products |
| ISOP | International Seismological Observing Period |
| ISOP | International Society of Ophthalmic Pathologists |
| ISOP | IT Standards Oversight Panel |
| ISOP | Internal Standard Operating Procedure(s) |
| ISOP | International Series of Poker (various locations) |