You may want to read about DataPivot, developed by Brio Technology during the same period as Lotus. Brio had a patent on the pivot data aggregation algorithm, I

You may want to read about DataPivot, developed by Brio Technology during the same period as Lotus. Brio had a patent on the pivot data aggregation algorithm, I'm not sure how Lotus's pivot table worked... https://en.wikipedia.org/wiki/Brio_Technology https://en.wikipedia.org/wiki/Brio_Technology