Hi,

A good place to start learning about the history of Csound might be Barry
Vercoe's Forward to The Csound Book:

http://mitpress.mit.edu/e-books/csound/fpage/pub/csbook/contents/foreword.ht
ml

also check Max Mathews' Preface to the same book.

http://mitpress.mit.edu/e-books/csound/fpage/pub/csbook/contents/preface.htm
l

Regards,
Hans Mikelson