Arduino standard libraries location I want to read the source code of an arduino library that comes with the IDE. 
Specifically the GSM.h

I dont know the location of the standard libraries that come with the IDE.

I only know the location of the user installed libraries.

So where is the source code of GSM.h?
Ok, i found out the location.
In Win 7, it is C:\Program Files (x86)\Arduino\libraries