Readability is a service that works both on the desktop and on mobile devices to make it easier to read Web-based content. It’s primary function involves “cleaning up” a post by reformating the page to remove extraneous material, making the font more readable and displaying it in an easy-to-read (and easy-to-print) format. Readability does this by copying the article and hosting it on its servers, providing the user with a special “readable” link.
http://www.plagiarismtoday.com/2012/04/02/readability-copyright-ongoing-struggle-for-tech/
http://www.plagiarismtoday.com/2012/04/02/readability-copyright-ongoing-struggle-for-tech/