Perseus Digital Library is a project that explores "what happens when libraries move online". As online publication platforms continue to emerge and "and millions of books become digital, this question is more pressing than ever". The mission of the Perseus Digital Library is to "to make the full record of humanity - linguistic sources, physical artifacts, historical spaces - as intellectually accessible as possible to every human being, regardless of linguistic or cultural background". This larger mission is supported by three aims: the development of human readable information, the creation of machine actionable knowledge, and the production of machine generate knowledge. The Perseus Digital Library has a particular focus upon the Greco-Roman world but also intended to cover Early Modern English, the American Civil War, the History of Mechanics, and much more.