TN

[1] Trunk/Transit Network

[2] Transit Node (in Reference Configurations)

[3] Tone (C/I channel code: wake up signal)

[4] Technical Note

[5] Transaction Number

[6] Twisted Nematic

[7] Tennessee - USA-Staatenkürzel

[8] ISO3166 2LA ( = Ländercode bzw. TopLevelDomain) für Tunesia