| Abbreviation | Definition |
|---|---|
| ISBJ | International School of Broadcasting and Journalism |
| ISBL | Indian School Badminton League |
| ISBL | Indian School Basketball League |
| ISBM | International School of Bible and Mission |
| ISBR | International School of Business and Research |
| ISBR | International School of Business Research |
| ISBS | Imperial School of Business and Science |
| ISBS | International Strategy Business School |
| ISC | Indian School Certificate |
| ISC | International School Consultancy |
| ISC | International School of Choueifat |
| ISC | international schools in China |
| ISCAP | Iowa School Cash Anticipation Program |
| ISCC | Independent Schools Compensation Corporation |
| ISCD | International School of Colour and Design |
| ISCE | Indian School Certificate Examination |
| ISCP | International School of Canine Psychology |
| ISCRA | International School of Cosmic Ray Astrophysics |
| ISCT | International School of Cape Town |
| ISD | Independence School District |