Google has actually been using reCAPTCHA with an ulterior motive: crowdsourcing the digitization of old newspapers and books.

FORBES: Artificial Intelligence Will Defeat CAPTCHA -- How Will We Prove We're Human Then?

In a fast-moving world where technological innovation has brought new developments in e-books and online access to contents of books, UNESCO Secretary General Irina Bokova has maintained that in celebrating World Book Day, it is important to remember that there can be no book development without consideration for copyright, especially when digitization further exposes books to risks of illicit use.

UNESCO: 2010 World Book Day

Nothing that will happen over the next ten years can undo the way the past decade's digitization of entertainment--movies, music and books--has made it difficult or impossible to control its dissemination.

FORBES: Digital Tools