nginx [engine x] is a HTTP server and mail proxy server written by Igor Sysoev.
A rich hosted Exchange environment for every user without having to manage a server.
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.
This page contains a meta robots tag which tells search engines and robots to index or not index the page.
The Open Graph protocol enables any web page to become a rich object in a social graph, a open protocol supported by Facebook