What does ISDN mean?
Integrated Services Digital Network
Other definitions of ISDN:
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How to use the term ISDN:
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More slang terms:
MTR is a common abbreviation which is applicable to many things including the following (but not limited to): 1. Metro (mtr) 2. Meter (mtr) 3. Meteor (mtr) 4. Motor (mtr) 5. Mountain Top Removal (MTR) 6. Mass Trassit Railway (MTR) 7. Ministry of Tourism (MTR) 8. Montreal among many other things...