| Meaning | Category |
| In These Times | Community->Media |
| In This Thread | Internet->Chat |
| Information Technology Team | Business->General |
| Inside Technology Training | Business->General |
| Intention To Treat | Medical->Hospitals |
| Inter Terminal Transport | Governmental->Transportation |
| Inter-Test Time | Academic & Science->Electronics |
| Interactive Tailoring Tool | Computing->Software |
| Internal tibial torsion | Medical->Physiology |
| International Telephone And Telegraph | Business->Firms |
| Invitation To Tender | Business->General Governmental->US Government |
| It Takes Time | Community |
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