| Abbreviation | Definition |
|---|---|
| RISA | Retrosigmoid Intradural Suprameatal Approach |
| RISA | Rhode Island Soccer Association |
| RISA | Rhode Island Songwriters Association |
| RISA | Rionet Intelligence Sophisticated Amenity |
| RISB | Rotter Incomplete Sentences Blank |
| RISC | A Reduced Information Set Computer |
| RISC | Rapid Information Sorting Capacity |
| RISC | Rchitecturesreduced Instruction Set Computers |
| RISC | Re Inventing Schools Coalition |
| RISC | Recovery Industry Services Company |
| RISC | Reduce Instruction Set Computer |
| RISC | Reduced Instruction Set Chip |
| RISC | Reduced Instruction Set Computing |
| RISC | Reduced Introduction Set Computer |
| RISC | Reduces Instruction Set Controller |
| RISC | Reliability Issues Steering Committee |
| RISC | Reporters Instructed in Saving Colleagues |
| RISC | Resources Information Standards Committee |
| RISC | Responsive Intermittent Storage Circuit |
| RISC | Risk and Incident Sharing and Coordination |