What does ATO stand for?
ATO stands for "Analog Tandem Office"
How to abbreviate "Analog Tandem Office"?
"Analog Tandem Office" can be abbreviated as ATO
What is the meaning of ATO abbreviation?
The meaning of ATO abbreviation is "Analog Tandem Office"
What does ATO mean?
ATO as abbreviation means "Analog Tandem Office"