The first subject, Information, is perhaps the oldest part of this movement. Gutenberg can be considered one of its earliest advocates, since he invented the printing press, allowing the public at large to read and become educated. Today, Open Information has grown phenomenally with the Internet, which allows anybody online to access an immense wealth of knowledge.
More recently there have been more or less successful attempts to centralize open knowledge. Wikipedia, for example, is an online encyclopedia where anyone can contribute, correct, or complete articles. On August 25, 2022 it had some 6,544,007 articles in English, making it larger than any printed encyclopedia.