Extension Description Author File / Link
tsv Plain-text tabular data with tab-delimited fields (text/tab-separated-values) IANA (media type registration) Link
ttf TTF free source project Link
Opentype Spec Microsoft Corp. Link
Truetype Spec 1.66 Microsoft Corp. Download
The TrueType Font File Apple Deprecated resource Link
twain TWAIN 1.8 Specification (Acrobat) Download
twt Carmageddon 2: Carpocalyse Now TWT fileformat the KILLER Download
txf Tax Exchange Format Deprecated resource Download