The calculator section is divided into 4 groups:

  1. Slide Rules
  2. Mechanical & Electrical Adders and Calculators
  3. Micro Computers
  4. Misc. Items (Early artifacts, manuals, etc.)
Click on the buttons above the gallery to switch groups. To see a larger image of a slide rule, just click on it.


In the period from 1978 - 1984, I tried to get a computer museum started in Minnesota. It was lots of fun and I met lots of interesting people in the process and also collected lots of stuff in the event that the dream became a reality. Well, things did not work out but I did end up with a very full classroom museum and lots of goodies.

From 1982 - 1999, I designed software for MECC. During that time I managed to save lots of micro-related items and publications. Now I am nearing retirement and my computer collecting interests are waning! I have already started selling off the the slide rules and calculators on eBay. If you see anything of interest, let me know.