I'm surprised this thread got so large without anyone mentioning Lotus Improv or Quantrix. Quantrix was the later re-implementation of Lotus by lighthouse desig

I'm surprised this thread got so large without anyone mentioning Lotus Improv or Quantrix. Quantrix was the later re-implementation of Lotus by lighthouse design, after Lotus had canceled Improv. Improv/Quantrix was a multidimensional spreadsheet, Each model could contain multiple tables, and of course multiple views. Formulas were separate from data, so it was easy to audit a model. Clicking on a formula (in 1991) showed you all the related input and output sources. It was the first spreadsheet with pivot tables. Of course since it's secretly a database down below, you could do databasey things like joins and group by. In 1991. Videos of using Improv. https://www.youtube.com/watch?v=TbsfvdZXE7s https://www.youtube.com/watch?v=TbsfvdZXE7s https://www.youtube.com/watch?v=TbsfvdZXE7s https://www.youtube.com/watch?v=TbsfvdZXE7s https://www.youtube.com/watch?v=lTko_Pt2ZZg https://www.youtube.com/watch?v=lTko_Pt2ZZg