UX: Tools for Software Archeology – Screenshots from GUIdebook
Want to see how UIs have changed through the years? An email thread at Microsoft pointed me at an online resource called guidebook - http://www.guidebookgallery.org/
It doesn’t look to have been updated since 2006, but if you are looking for screenshots from older products, then you might find it in it’s screenshots section - http://www.guidebookgallery.org/screenshots
