| ta | Sony Xperia Flash Tool Trima Area Data |
| ta2m | SAM Trimmed Alignment Data |
| ta5 | TaxACT 2015 Tax Return Data |
| ta6 | TaxACT 2016 Tax Return Data |
| ta7 | TaxACT 2017 Tax Return Data |
| tab | SQL Script Tables |
| tabrpt | CommScope Teletilt Control System Tabbed Site Report File |
| tac | ActiCalc Data |
| tacx | Tacx Exported Training Data |
| tad | TA Orchestrator Data |
| taf | ADRIFT Text Adventure File |
| tag | DataFlex Query Tag |
| tags | abcAVI Tag Editor Tags Data |
| tai | Nvidia Texture Atlas Tool Texture Data |
| tajima | Tajima Embroidery Data |
| tal | BrainVoyager QX Talairach Coordinates |
| tan | RFM Tangent Altitudes File |
| tap | GSM Transferred Account Procedure Data |
| tap | ZX Spectrum Emulator Tape Data TAP |
| tape | TapeCalc Tape Data |
| tapesrcmdl | Softimage Tape Source Model |
| tarc | TrakAxPC Data |
| tas | ADRIFT Text Adventure Save |
| tat | Topocad Attributes Data |
| tav | TIGR Array Viewer Format Data |
| tavg | POP Time-averaged History Data |
| tax | Intuit TurboTax Data |
| tax08 | Intuit TurboTax 2008 Tax Return Data |
| tax2008 | Intuit TurboTax 2008 Tax Return Data |
| taxform | Intuit QuickBooks Draft Data |
| tb | Tabbery Tab |
| tb0 | Adobe Photoshop Thumbnail Cache |
| tb2 | TASBooks 2 Company Data Backup |
| tb3 | Intel VTune Performance Monitor Sampling Data |
| tb4 | Intel VTune Performance Monitor Sampling Data |