If you are looking for audio files, "GTS" and "TNK" are sometimes used in the naming of SoundFont or sample packs for software like .

: This paper describes several zipped datasets containing FASTA files and feature vectors for bacterial proteins.

In technical lists related to smart cards and mobile virtual network enablers (MVNE), "GTS" and "TNK" appear as specific identifiers:

: Documentation for these systems can often be found in the pcsc-tools smartcard list . 3. SoundFont Resources (Music Production)