Lotus Improv: A 1990 NeXT Spreadsheet Demo

HN links it in spreadsheet-reinvention threads as the clearest look at what Improv did differently, with a distinctive NeXTstep aesthetic.

A 1990 Lotus sales demo of Improv, a spreadsheet built for the NeXT computer that rethought the grid with named categories and multiple views. The uploader, who tested it at Price Waterhouse, presents it as an early, innovative vision of the spreadsheet.