WordPress is a free and open source blogging tool and a
content management system (CMS) based on PHP and MySQL. It has many
features including a plug-in architecture and a template system.
WordPress is used by over 16.7% of Alexa Internet's "top 1 million"
websites and as of August 2011 manages 22% of all new websites.
WordPress is currently the most popular blogging system in use on the
It was first released on May 27, 2003, by founders Matt
Mullenweg and Mike Little as a fork of b2/cafelog. As of December 2011,
version 3.0 had been downloaded over 65 million times.
One very popular feature of WordPress is its rich plugin architecture
which allows users and developers to extend its abilities beyond the
features that are part of the base install; WordPress has a database of
over 22,000 plugins with purposes ranging from SEO to adding widgets.
Widgets are small modules that offer users drag-and-drop sidebar
content placement and implementation of many plugins' extended
abilities. Widgets allow WordPress developers to add functionality to
their sites. These small modules can be used to add functionality such
as a slideshow, Facebook Like box, small news slider, and more
Multi-user and multi-blogging
Prior to WordPress 3.0, WordPress supported one blog per
installation, although multiple concurrent copies may be run from
different directories if configured to use separate database tables.
WordPress Multi-User (WordPress MU, or just WPMU) was a fork of
WordPress created to allow multiple blogs to exist within one
installation that is able to be administered by a centralized
maintainer. WordPress MU makes it possible for those with a website to
host their own blogging community, as well as control and moderate all
the blogs from a single dashboard. WordPress MU adds eight new data
tables for each blog.
WordPress MU merged with WordPress as part of the 3.0 release.
Native applications exist for WebOS, Android, iOS (iPhone, iPod Touch, iPad),Windows Phone, and BlackBerry.