I retired from teaching a while ago. In fact, my last class at the British Columbia Institute of Technology was eight years ago next month! So, I'm a little silly to keep it on Dropbox. I don't think anyone will visit the site to download a copy.
I may do so, in part, as it is the oldest electronic document I have. Some of the initial keystrokes were done on my IBM clone in the mid-1980s. Of course, it's changed a lot over the years but it's comforting to know that I can still easily add to a file that I started so very long ago!