nginx [engine x] is a HTTP server and mail proxy server written by Igor Sysoev.
The BIG-IP product suite is a system of application delivery services that work together on the same best-in-class hardware platform or software virtual instance. From load balancing and service offloading to acceleration and security, the BIG-IP system ensures your applications are fast, secure, and available.
websites using the $ symbol on their website - meaning it may accept payment in this currency used in Israel.