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And a form of movable type appeared in China as early as the 11th century, though it’s unclear whether Gutenberg would have known of it, Fletcher said.

What a book is has certainly changed over time, as clay tablets, papyrus scrolls, parchment and quills have given way to codexes, movable type, mechanized printing processes and e-readers.

In 1623, when the First Folio was printed, every page had to be set up for the press by hand, using tiny metal letters called movable type.

The same could all be said of Gutenberg’s movable type.

He regards Mr. Berners-Lee’s 1989 invention as an innovation as significant as Johannes Gutenberg’s development of movable type in the 15th century.