Code flow

hi I am working on the code flow of asterisk the open source pbx.
I want to know from which program of which file of which directory shall I start reading the code?
also I want to know from where the execution of the file begins and, which is the first file or programs gets executed when asterisk is powered up first?

Thanks & Regards: Prashant.

I think you should begin with the file asterisk.c in the root directory of the asterisk source code.