| Abbreviation | Definition |
|---|---|
| ISFA | Independent Schools Football Association |
| ISFA | Independent Schools Foundation Academy |
| ISFC | Indian School |
| ISFS | ICFAI school of Financial Studies |
| ISFS | International School for Foundation Studies |
| ISFT | In School Field Trips |
| ISG | International School of Gemology |
| ISGM | International School |
| ISGM | International School Grounds Month |
| ISGM | International School of General Management |
| ISGP | Independent School Gender Project |
| ISGS | International School for Graduate Studies |
| ISHA | International School of Healing Arts |
| ISHB | International School of Hout Bay |
| ISHC | Independent School Health Check |
| ISHE | Inter Schools Horse Extravaganza |
| ISHM | International School of Hydrocarbon Measurement |
| ISHM | International School Of Hydrocarbon Measurements |
| ISHP | Individual School Healthcare Plan |
| ISHP | integrated School Health Programme |