| 11. | .talk | Text to speech |
| 12. | .tap | Tape file (ZX Spectrum emulator by g.a.lunter) |
| 13. | .tar | Tape ARchive Compressed file archive. Tar is a UNIX method of archiving files, which can also be used by PCs. Tar archives files but does not compress them, so sometimes .tar f… 0.5 KB |
| 14. | .tar.gz | Combined filename extension for a file that has been archived using tar and then gzipped. |
| 15. | .tar.z | tar.z or .tar.Z Combined filename extension for a file that has been archived using tar and then zipped. |
| 16. | .targa | Bitmap graphics (Truevision Targa format) |
| 17. | .tax | Data file (Turbo Tax) |
| 18. | .taz | Compressed file.tar.Z archive (ascii) (tar and compress) |
| 19. | .tb1 | Font file (Borland Turbo C) |
| 20. | .tb2 | Font file (Borland Turbo C) |
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