Apache is a free and open-source cross-platform web server software.
Mod_jk is an Apache module used to connect the Tomcat servlet container with web servers such as Apache, iPlanet, Sun ONE (formerly Netscape) and even IIS using the Apache JServ Protocol. A web server waits for client HTTP requests.
mod_wsgi is an Apache HTTP Server module that provides a WSGI compliant interface for hosting Python based web applications under Apache.
OpenSSL is a software library for applications that secure communications over computer networks against eavesdropping or need to identify the party at the other end.
PHP is a general-purpose scripting language used for web development.
Python is an interpreted and general-purpose programming language.
Unix is a family of multitasking, multiuser computer operating systems.