I’ve spent a bit of time reading some articles over at GUIdebook. I followed a link off their trivia section to an article titled: The Windows® 95 User Interface: A Case Study in Usability Engineering. I enjoyed reading about their approach to the design and use of prototyping (in visual basic 3) . The article also includes some of the documentation forms that were used in the project. I think I will be able to use these in future projects of my own 
Here is a cool series of icons from GUIdebook. The top left was from Windows 3.0 shows how the icon was refreshed with each major release of the operating system.
