The work of the IEM server is not accomplished magically. Here is a listing of some of the software utilized to make the IEM work.
RedHat Linux
A very robust distribution of the GNU/Linux operating system.
PostgreSQL Database
Open-Source database software that stores IEM data.
PostGIS
Spatial datablade for PostgreSQL.
Apache Web-Server
Open-Source web server.
PHP
PHP is a server-side scripting languauge for dynamically generating HTML.
JPGraph
PHP add-on that generates plots for the web-site.
Python
Versatile scripting language used for CGI scripts, DB access scripts, and system scripts.