Unified Advertising and Analytics solutions from Google
Library of precisely prepared monochromatic icons and symbols, created with an emphasis on simplicity and easy orientation.
Anti-bot CAPTCHA widget that helps digitize books by providing snippets of books for people to enter the text for. Owned by Google.
This site uses the viewport meta tag which means the content may be optimized for mobile content.
nginx [engine x] is a HTTP server and mail proxy server written by Igor Sysoev.
PHP is a widely-used general-purpose scripting language that is especially suited for Web development and can be embedded into HTML.
Google Tag Manager makes it easy for marketers to add and update website tags including analytics, remarketing, and more.
UTF-8 (8-bit UCS/Unicode Transformation Format) is a variable-length character encoding for Unicode. It is the preferred encoding for web pages.
A scheme.org entity that represents an organization such as a school, NGO, corporation, club, etc.
Open graph description entity tag
The Open Graph protocol enables any web page to become a rich object in a social graph, a open protocol supported by Facebook