| TABD | Trans-Atlantic Business Dialogue |
| TAFTA | Trans-Atlantic Free Trade Area |
| TBT | Technical Barriers to Trade |
| TCDC | Technical Cooperation between Developing Countries |
| TCF | Textiles, clothing and footwear |
| TDB | Trade and Development Board |
| TDR | Trade and Development Report |
| TE | Traditional expression |
| TEA | Trade Expansion Act (United States) |
| TECA | Trade and Economic Cooperation Agreement |
| TEL | Telecommunications (APEC) |
| TEL | Temporary Exclusion List (AFTA) |
| TEU | (Maastricht) Treaty of European Union |
| TID | Trade and Investment Data (APEC) |
| TIDDB | Trade and Investment Data Database (APEC) |
| TIFA | Trade and Investment Framework Agreement |
| TIGR | The Institute for Genomic Research |
| TILF | Trade and investment liberalisation and facilitation (APEC) |
| TIS | Trade in services |
| TLT | Trademark Law Treaty (WIPO) |
| TMB | Textiles Monitoring Body |
| TNC | Trans-national corporation |
| TNC | Trade Negotiations Committee |
| TOT | Transfer of technology |
| TP | Trade Promotion (APEC) |
| TPM | Trigger Price Mechanism |
| TPO | Trade Promotion Organizations (APEC) |
| TPRB | Trade Policy Review Body |
| TPRM | Trade Policy Review Mechanism |
| TPT | Transportation |
| TQ | Tariff quota |
| TRACLAP | Trade-related aspects of competition law and policy |
| TRAPs | Trade-related antitrust principles |
| TREAD | Trade-Related Entrepreneurship Assistance and Development |
| TREM | Trade-restrictive environmental measure |
| TREPs | Trade-related aspects of environmental policies |
| TRIMS | Trade-related investment measures |
| TRIPS | Trade-related aspects of intellectual property rights |
| TRQ | Tariff rate quota |
| TSB | Textile Surveillance Body |
| TSUS | Tariff Schedule of the United States |
| TTMRA | Trans-Tasman Mutual Recognition Arrangement |
| TWG | Tourism Working Group (APEC) |