Apache is a free and open-source cross-platform web server software.
Mod_perl is an optional module for the Apache HTTP server. It embeds a Perl interpreter into the Apache server. In addition to allowing Apache modules to be written in the Perl programming language, it allows the Apache web server to be dynamically configured by Perl programs.
mod_wsgi is an Apache HTTP Server module that provides a WSGI compliant interface for hosting Python based web applications under Apache.
Perl is a family of two high-level, general-purpose, interpreted, dynamic programming languages.
Python is an interpreted and general-purpose programming language.
Unix is a family of multitasking, multiuser computer operating systems.