I believe that VisiCalc was the first to ship a functional spreadsheet. I remember watching RichHarris’s “Rich Harris - Rethinking reactivity” video introducing Svelte 3, and he discussed an earlier academic spreadsheet concept.
An interesting product! It was shipped by a company (if I remember right) called "Personal Software" or some such. They marketed software they collected from individual developers.
VisiCalc was their one runaway success. So much so, they changed their name to VisiCorp.
