| Royal Arsenal Co-operative Society | Academic & Science |
| Rochester Academy Charter School | Academic & Science |
| Research Administration Certificate Series | Academic & Science |
| Regulatory Affairs Certification Services | Business |
| Revenue Accounting Collection System | Business |
| Reading And Communication Skills | Community |
| Russian American Community Services | Community |
| Research Advanced Computing Services | Computing |
| Recent Advances in Computer Systems | Computing |
| Repository for Annotations, Corpora and Schemas | Computing |
| Resource and Admission Control Subsystem | General |
| Ripoff Anime Cutthroat Shop | General |
| Road Automobile Communication System | General |
| Radio Applications Cloud Server | General |
| Remote APDU Call Secure | General |
| Remington Accessory Chassis System | General |
| Russian American Colony Singers | General |
| Ridglan Animal Care Systems | General |
| Rape and Abuse Crisis Service | General |
| Resource and Admission Control Sub | General |
| Resilient Adaptable Communications System | General |
| Research in Adaptive and Convergent Systems | General |
| Refugee Advice Casework Service | General |
| Riser Annulus Condition System | General |
| Roll and Attitude Control Subsystem | General |
| Remote Automatic Calibration System | Governmental |
| Rotation Axis Coordinate System | Governmental |
| Royal Army Corps of Sahrani | Governmental |
| Rehab And Comfort Station | Medical |
