Principia Cybernetica

... can be found at http://pespmc1.vub.ac.be/

from the site:

As cybernetic theory informs our philosophy, so cybernetic technology lets us do things that philosophers of other times could only dream of. Using computer technology, we develop a large philosophical text from many nodes which are linked together with different relationships. Readers can navigate among the many concepts, guided by their individual understanding and interests. Disparate material can be integrated together while being written and read by collaborators from all around the world, undergoing variation and selection. Thus we apply theories about the evolution of cybernetic systems to the practical development of this very system of philosophy.

A public annotatetable monitor of the recent changes of PrincipiaCybernetica is here: http://pespmc1.vub.ac.be/RECENT.html.