Advanced Digital Network -or- Any Day Now

Online jargon, also known as text message shorthand, used primarily in texting, online chat, instant messaging, email, blogs, and newsgroup postings, these types of abbreviations are also referred to as chat acronyms.

"ADN" usually refers to an Advanced Digital Network, which is a 56K leased line or a dedicated line. "ADN" also means "Any Day Now."

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See also : bandwidth  BITD  DDSOS  
NetLingo Classification: Acronyms and Text Message