| Acronym | Definition |
|---|
| ISSL➣IBM Software Services for Lotus |
| ISSL➣International Sunday School Lesson (Christianity) |
| ISSL➣Initial Spares Support List |
| ISSL➣Index to Sumerian Secondary Literature |
| ISSL➣Internet Solutions Services Ltd. (UK; website developers) |
| ISSL➣Integrated Services Over Specific Links |
| ISSL➣International School São Lourenço (Portugal) |