Hetzner Online GmbH is an Internet hosting company and data center operator based in Gunzenhausen, Germany. It should not be confused with its South African namesake and partner company, Hetzner Ltd — the two are separate companies registered and incorporated in their own rights under the applicable country laws.
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.
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
Chrome for Android, since version 39 supports the "theme-color" meta tag to allow websites control the background color of the tab's UI header.
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.