sort by Rank | Alpha
| Possible Meanings | Rank |
|---|
| Reed Technology and Information Services | *** |
| radiation therapy information system | ** |
| Reel Tab Inserter System | ** |
| Regional Traffic Information System | ** |
| Road Traffic Information Systems | ** |
| Real Time Information Systems | ** |
| Radiation Threat Identification System | ** |
| Regional Transit Information System | ** |
| Real Time Internet Services | * |
| Regional Transportation Investment Subcommittee | * |
| Real Time Interactive Systems | * |