"Like the human body, the book is a form of information transmission and storage that incorporates its encodings in a durable material substrate. Once encoding in the material base has taken place, it cannot easily be changed. Print and proteins in this sense have more in common with each other than with any magnetic or electronic encodings, which can be erased and rewritten simply by changing the magnetic polarities. The metaphors of books, alphabets and printing pervasive in the discourse of genetics are constituted through and by this similarity of corporeal encoding in books and bodies."
— N. Katherine Hayles How We Became Posthuman: Virtual Bodies in Cybernetics, Literature, and Informatics, 1999