A9 manages product search and advertising technologies that are scalable, highly available, and cross-platform for Amazon and other clients.
Ads.txt stands for Authorized Digital Sellers and is a simple, flexible and secure method that publishers and distributors can use to publicly declare the companies they authorize to sell their digital inventory.
nginx [engine x] is a HTTP server and mail proxy server written by Igor Sysoev.
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.