| TA | Technical Assistance |
| TAA | Trade Adjustment Assistance (United States) |
| TABD | Transatlantic Business Dialogue |
| TARIC | Integrated Tariff of the European Communities |
| TBT | Technical Barriers to Trade |
| TCC | Trade Compliance Center, U.S. Department of Commerce |
| TCMD | Third Country Meat Directive |
| TD (T/D) | Time Draft |
| TD | Trade Development (U.S. Department of Commerce) |
| TDP | Trade and Development Program |
| TEC | Tariff Exterieur Commun (Common External Tariff) |
| TEP | Transatlantic Economic Partnership |
| TETA | Transport Education Training Authority |
| TEU | Treaty on European Union (Maastricht Treaty) |
| TFYR | The Former Yugoslav Republic (of Macedonia) |
| TNC | Trade Negotiations Committee |
| TNC | Transnational Corporation |
| TPA | Trade Promotion Authority |
| TPC | Trade Policy Committee (United States) |
| TPES | Total Primary Energy Supply |
| TPM | Trigger-Price Mechanism |
| TPO | Trade Promotion Organisation |
| TPRG | Trade Policy Review Group (United States) |
| TPRM | Trade Policy Review Mechanism |
| TPSC | Trade Policy Staff Committee (United States) |
| TPSC | Trade Policy Subcommittee (United States) |
| TRIMS | Trade-Related Investment Measures |
| TRIPS | Trade-Related Aspects of Intellectual Property Rights |
| TSB | Textile Surveillance Body |
| TSI | Trade Support Institution |
| TSUS | Tariff Schedule of the United States |
| TVA | Value-Added Tax (Taxe à la Valeur Ajoutée) |
| TWA | Trade-Weighted Average |
| TWEA | Trading With the Enemy Act |
