Polyfill is a service which accepts a request for a set of browser features and returns only the polyfills that are needed by the requesting browser.
nginx [engine x] is a HTTP server and mail proxy server written by Igor Sysoev.
Amazon Route 53 is a highly available and scalable Domain Name System (DNS) web service.
UTF-8 (8-bit UCS/Unicode Transformation Format) is a variable-length character encoding for Unicode. It is the preferred encoding for web pages.