I believe it was inspired by Mathematica which created the concept of notebooks with cells backed by a kernel in 1988: https://en.wikipedia.org/wiki/Wolfram_Ma

I believe it was inspired by Mathematica which created the concept of notebooks with cells backed by a kernel in 1988: https://en.wikipedia.org/wiki/Wolfram_Mathematica#The_Notebook_interface https://en.wikipedia.org/wiki/Wolfram_Mathematica#The_Notebo...