nginx [engine x] is a HTTP server and mail proxy server written by Igor Sysoev.
A family of standard web feed formats used to publish frequently updated information like blog entries, news headlines, audio and video.
Really Simple Discovery is a way to help client software find the services needed to read, edit, or "work with" weblogging software.
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.