| Abbreviation | Definition |
|---|---|
| TRPPC | TransCanada Pipelines, LTD. Preferred C |
| TRR | T R C Companies, Inc. |
| TRU | Torch Energy Royalty Trust |
| TRW | TRW, Inc. |
| TRWPB | TRW, Inc. Preferred B |
| TRWPD | TRW, Inc. Preferred D |
| TRY | TriArc Companies, Inc. |
| TRZ | Trizec Properties, Inc. |
| TSA | The Sports Authority, Inc. |
| TSD | Tele Sudeste Celular Participatory |
| TSG | Sabre Holdings Corporation |
| TSK | Computer Task Group, Inc. |
| TSM | Taiwan Semiconductor Manufacturing Company |
| TSN | Tyson Foods, Inc. |
| TSO | Tesoro Petroleum Corporation |
| TSP | Telecommunicacoes de Sao Paulo |
| TSS | Total System Services, Inc. |
| TSU | Tele Celular Sul Participaco |
| TSY | Tech Sym Corporation |
| TT | Transtechnology Corporation |