I think spreadsheets came out earlier: https://en.wikipedia.org/wiki/Spreadsheet https://en.wikipedia.org/wiki/Spreadsheet says 1969 for a commercial product.

I think spreadsheets came out earlier: https://en.wikipedia.org/wiki/Spreadsheet https://en.wikipedia.org/wiki/Spreadsheet says 1969 for a commercial product. Basically they're "just" a declarative data-flow system. Similar timeframe, but slightly earlier, at least as far as my wikipedia-fu is suggesting[1], in the 60s. But yeah, they've been awfully transformative after that, and continue to be. I can't really think of a better counter-example at the moment. [1]: https://en.wikipedia.org/wiki/Dataflow_programming https://en.wikipedia.org/wiki/Dataflow_programming