Bro if you had made it clearer as to whcih type of abbreviation you were looking for, i would have given you straight answer because ISN stands for quite a few things, anyways you can try the following link to see if you find your desired abbreviation:
http://en.wikipedia.org/wiki/ISN
Commercial Investment Trust
Hong Kong and Shanghai Banking Corporation
Comptant is what the letters cpt stand for in French banking.Specifically, the word functions as a masculine adjective or noun. Either way, it translates as "cash." The pronunciation will be "ko-taw" in French.
Federal Deposit Insurance Corporation
Binder Dijker Otte
The letters STP stand for Standerd Temperature and Pressure
ISN=Initial Sequence Number ISN=Interactive Student Notebook ISN=International Society For Nephrology
Without an equality sign the given letters can't be considered to be an equation.
If the letters are in parentheses after a name, example John Doe (Bs), I believe they stand for "British subject".
In this context, DOE may stand for depends on experience.
Bambi's mate Faline. Today's Times crossword asks for a Disney doe, three letters?
It stands for "Bitmap".
Department of Energy
It means depending on experience.
Cytochrome p‐450.
The arrows stand for the 13 original colonies.
In Chemistry, this is the abbreviation for Ethanol. C2H5OH.