sort by Rank | Alpha
| Possible Meanings | Rank |
|---|
| Islamic Society of Tulsa | *** |
| International Symposium on Optomechatronic Technologies | *** |
| Iliff School of Theology (Denver, CO) | *** |
| Indian Society of Organ Transplantation | *** |
| INFORMS Section on Telecommunications | *** |
| Internet Services of Texas | ** |
| International Society of Ocular Toxicology | ** |
| International Spirit of Truth | ** |
| International Society of Ocular Trauma | ** |
| Israeli Society of Occupational Therapy | ** |
| International Students of Tampere | * |
| International Society for Ocular Toxicology | * |
| Interdenominational School of Theology | * |
| International Society On Toxinology | * |
| International Stationery and Office Technology | * |
| Integrated Systems Operations Testing | * |