the Future of the Theory, And The Generation of a Living World by Christopher Alexander presentation recorded live in San Jose, California, October, at The 1996 ACM Conference on Object-Oriented Programs, Systems, Languages and Applications (OOPSLA).
How to create applications that look right, behave properly, and fit into the GNOME user interface as a whole, covers specific advice on making effective use of interface elements, and the philosophy and general design principles behind GNOME interface.