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A comparable precursor to the internet was MINITEL in France.

The Internet predates MINITEL, at least if you consider ARPANET its birth.

Two pre-ARPANET prototypes were "oN-Line System" and Memex.

Douglas Engelbart's "Mother of all Demos" still blows my mind every time I watch it. Douglas Engelbart was inspired by Vannevar Bush "Memex.