When the pizza box Performa's came out they came with a program called Expresso Calendar. I believe it was made by Berkley Systems. It was a handy little program that would actually allow you to put an editable calendar on your desktop. It was really quite cool especially for the time period. Since Berkley Systems has been long since gone by the way of the YUGO automobile I think it would be a great candidate for being considered Abandonedware?
After doing a web search to no avail I did happen across a current program of the same name Expresso but it is NOT the same program.
Here is an article about it http://webdevelopersjournal.com/archive/expresso.html
I noticed that according to the article they also had a "StarDate" version of it which I had never seen which may be cool if anyone has it? This version seems like it would be a rare find and great to preserve on MG.

Unless someone knows personally, the particular Performa install CD.