[waleedka]

Not only the language, but have at least one line that says what this is. I can guess that it’s a hosted notebook service, but I can’t tell how it’s different from Jupyter Notebook. Is the difference in the language it uses, or are there other differences?

[jacobolus]

See https://beta.observablehq.com/@mbostock/five-minute-introduc... and the links therein, e.g. the video they made https://www.youtube.com/watch?v=uEmDwflQ3xE