| Acronym | Definition |
|---|
| IOSP➣Input Output Server Processor |
| IOSP➣Integrative and Organ Systems Pharmacology (course; various locations) |
| IOSP➣Instytut Organizacji Systemow Produkcyjnych (Polish: Institute of Organization Systems) |
| IOSP➣International Order of the Sword and the Pen |
| IOSP➣Irrigation Operations Support Project (World Bank) |
| IOSP➣Infectious Osteomyelitis of the Symphysis Pubis (bone disease) |