I agree on RAD, but "history of being used in spreadsheet software" is a bit of an overstatement: there are Picosheet showcase [1] and one of the 7GUIs tasks [2

I agree on RAD, but "history of being used in spreadsheet software" is a bit of an overstatement: there are Picosheet showcase [1] and one of the 7GUIs tasks [2] that are made with Red and implement bare-bone native spreadsheets in a handful of code, but that's pretty much it (AFAIK). And no, Red is a general-purpose language, not specific to spreadsheets like TabulaScript, so your "similar enough" is quite misleading. This reminds of TreeSheets and Lobster [3] though. [1]: https://www.red-lang.org/2016/07/native-reactive-spreadsheet-in-17-loc.html https://www.red-lang.org/2016/07/native-reactive-spreadsheet... [2]: https://github.com/9214/7guis-red/blob/master/cells.red https://github.com/9214/7guis-red/blob/master/cells.red [3]: https://github.com/aardappel/treesheets/tree/master/lobster https://github.com/aardappel/treesheets/tree/master/lobster