| Meaning | Category |
| Teachers' Behavior Inventory | Community->Educational |
| Team Brain Injury | Medical->Physiology |
| Technology Business Incubator | Business->General |
| Tennessee Bureau of Investigation | Governmental->State & Local |
| Texas Back Institute | Medical->Hospitals |
| The Big Issue | Governmental->US Government |
| The Bight, Bahamas | Regional->Airport Codes |
| The Tinkerers Bureau Of Investigation | Miscellaneous->Funnies |
| Throtle Body Injected | Governmental->Transportation |
| Throttle Body Injection | Governmental->Transportation |
| Through-Bulkhead Initiator | Governmental->NASA |
| Tissue Banks International | Community->Non-Profit Organizations |
| Toleranced By Inspection | Business->General |
| Tom Brown, Inc. | Business->NYSE Symbols |
| Total body irradiation | Medical->Oncology Medical->Physiology |
| TransBorder Institute | Academic & Science->Universities |
| Traumatic Brain Injury | Community->Educational Medical->Physiology |
| Tuboscope, Inc. / VETCO International (delisted) | Business->NYSE Symbols |
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