This script is the defacto way to enable use of HTML5 sectioning elements in legacy Internet Explorer.
nginx [engine x] is a HTTP server and mail proxy server written by Igor Sysoev.
mod_pagespeed is an open-source Apache module that automatically optimizes web pages and resources on them.
websites using the $ symbol on their website - meaning it may accept payment in this currency used in Israel.
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.