| Acronym | Definition |
|---|
| RISS | Research Institute of Science for Safety and Sustainability (Japan) |
| RISS | Reference Information Storage System |
| RISS | Regional Information Sharing System |
| RISS | Reference Information Storage System (HP) |
| RISS | Research Institute for Socionetwork Strategies (Kansai University; Japan) |
| RISS | Rhode Island Soft Systems (software company) |
| RISS | Regular Insulin Sliding Scale (diabetes management) |
| RISS | Real-Time IR/EO Scene Simulator |
| RISS | Robotic International Summer School (est. 2010) |
| RISS | Revised Injury Severity Score |