> I've used Jupyter since it was IPython notebook, but I don't think that community claims to be the first coming of notebooks.
My recollection (which could be wrong, it's been a while) is that SageMath’s notebook preceeded iPython notebooks. IIRC iPython started as a CLI repl, which may have come before the notebook.
(Mathematica came before all of them, and likely inspired SageMath’s interface)