What does ISDN stand for?
ISDN stands for "I Still Don't No"
How to abbreviate "I Still Don't No"?
"I Still Don't No" can be abbreviated as ISDN
What is the meaning of ISDN abbreviation?
The meaning of ISDN abbreviation is "I Still Don't No"
What does ISDN mean?
ISDN as abbreviation means "I Still Don't No"
