Digging further is for extreme nitpickers.
Gutenberg didn't "invent" the printing press either. Movable type dates back to 11th century China if you really want accurate attribution. Except for the purposes of the history of the modern world, Gutenberg's invention is most relevant/accurate.
My internet usage started on university systems back in the 80s, along with BBS and usenet and I had never heard the term Open Source even once until 1998.