nginx [engine x] is a HTTP server and mail proxy server written by Igor Sysoev.
Website using the £ symbol on their website - meaning it may accept payment in this British currency.
Website using the ¥ symbol on their website - meaning it may accept payment in this South Korean currency.
UTF-8 (8-bit UCS/Unicode Transformation Format) is a variable-length character encoding for Unicode. It is the preferred encoding for web pages.