Anti-bot CAPTCHA widget that helps digitize books by providing snippets of books for people to enter the text for. Owned by Google.
Google APIs are application programming interfaces developed by Google which allow communication with Google Services and their integration to other services.
This site uses the viewport meta tag which means the content may be optimized for mobile content.
CloudFlare is a global CDN and DNS provider that can speed up and protect any site online.
Allows a website to define how a page is rendered in Internet Explorer 8, allowing a website to decide to use IE7 style rendering over IE8 rendering.
Google's hosted library for web fonts. Allows websites to choose and use fonts from a free, wide variety of fonts.
The http-equiv attribute provides an HTTP header for the information/value of the content attribute. The http-equiv attribute can be used to simulate an HTTP response header.