Apache is a free and open-source cross-platform web server software.
Blogger is a blog-publishing service that allows multi-user blogs with time-stamped entries.
CentOS is a Linux distribution that provides a free, community-supported computing platform functionally compatible with its upstream source, Red Hat Enterprise Linux (RHEL).
Open Graph is a protocol that is used to integrate any web page into the social graph.
PHP is a general-purpose scripting language used for web development.