Acronyms, Abbreviations, and Initialisms.
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The meaning of the Acronym RTTL is...

RTTL is

  • Ringtone Text Transfer Language

RTTL is also in:

Acronym Definition Searched: MLO PACA LS/LS NW ICE 40619 CERX OBSB NFO DA QPP CCC XQM 14551 ASVS