Thanks Mark. My recent addition is a column that indicates if the road name/reporting mark is a railroad, private owner, or Lionel (includes literal Lionel and fantasy roads).
The data includes items I have, used to have, wish I had, and reference items. Sets get listed as well as the items in the set. All this adds to the data volume.
If I found the right database application it would have to be very flexible and I would definitely need a good data import function!