Definition: Cart.cgi stands for "Cgi", which in its modern form refers to an "interactive web page." This word was first used by Larry Page and Sergey Brin, known as Google founders, back in 1998. Definition: Cart CGI stands for "Interactive Content Generator" or "Interactive Content Management System". In a cart CGI environment, the user can customize HTML files for various purposes. Examples include creating interactive games, publishing blog posts, creating a forum, or even creating websites with customized themes and layouts. This technology allows users to create engaging content on their own web pages without needing any specialized software or programming skills. It's important to note that cart CGI is not something you can use commercially in the real world; it's designed for educational and testing purposes rather than being widely utilized in real-world applications like Google's Google+ service.