Contao is an open source CMS that allows you to create websites and scalable web applications.
HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.
Nginx is a web server that can also be used as a reverse proxy, load balancer, mail proxy and HTTP cache.
PHP is a general-purpose scripting language used for web development.
sIFR is a JavaScript and Adobe Flash dynamic web fonts implementation.
YouTube is a video sharing service where users can create their own profile, upload videos, watch, like and comment on other videos.