What does TTD stand for?
TTD stands for "Touch Tone Dialing"
How to abbreviate "Touch Tone Dialing"?
"Touch Tone Dialing" can be abbreviated as TTD
What is the meaning of TTD abbreviation?
The meaning of TTD abbreviation is "Touch Tone Dialing"
What does TTD mean?
TTD as abbreviation means "Touch Tone Dialing"
