| Acronym | Definition |
|---|
| ISSR | Inter Simple Sequence Repeat (genetic identification technology) |
| ISSR | Infrastructure System and Services Research |
| ISSR | Institute for Social Science Research |
| ISSR | International Society for Science and Religion ( University of Cambridge, UK) |
| ISSR | International Society for the Sociology of Religion (est. 1948) |
| ISSR | International Shiloh Shepherd Registry (dog breeding) |
| ISSR | Information Systems Security Representative |
| ISSR | Inside Services Sales Representative (job title) |
| ISSR | In School Suspension Room |
| ISSR | IBM Software Services Rational |
| ISSR | Internal Software Specification Review |
| ISSR | Incremental Software Specification Review |
| ISSR | In Store Service Request |
| ISSR | In-Service Support Review |
| ISSR | Inside Screening Router |