A content management system (CMS) is the collection of procedures used to manage work flow in a collaborative environment. These procedures can be manual or computer-based. The procedures are designed to:

1)Allow for a large number of people to contribute to and share stored data
2)Control access to data, based on user roles. User roles define what information each user can view or edit
3)Aid in easy storage and retrieval of data
4)Reduce repetitive duplicate input
5)Improve the ease of report writing
6) Improve communication between users

In a CMS, data can be defined as nearly anything - documents, movies, pictures, phone numbers, scientific data, etc. CMSs are frequently used for storing, controlling, revising, semantically enriching, and publishing documentation.

---

Joomla

Joomla! is a free and open source content management system for publishing content on the World Wide Web and intranets as well as a model–view–controller (MVC) Web application framework. It is written in PHP, stores data in MySQL and includes features such as page caching, RSS feeds, printable versions of pages, news flashes, blogs, polls, search, and support for language internationalization.
Within its first year of release, Joomla! was downloaded 2.5 million times. Over 5,000 free and commercial plug-ins are available for Joomla!.

You can also see this page to get more theme for your Joomla site.

History

Joomla! was the result of a fork of Mambo by the Joomla! development team on August 17, 2005. At that time, the Mambo name was trademarked by Miro International Pty Ltd, who formed a non-profit foundation with the stated purpose to fund the project and protect it from lawsuits The Joomla! development team claimed that many of the provisions of the foundation structure went against previous agreements made by the elected Mambo Steering Committee, lacked the necessary consultation with key stake-holders and included provisions that violated core open source values.
The Joomla! development team created a web site called OpenSourceMatters.org to distribute information to users, developers, web designers and the community in general. The project team leader Andrew Eddie, AKA "MasterChief" wrote an open letter to the community which appeared on the announcements section of the public forum at mamboserver.com.
A little more than one thousand people had joined the opensourcematters.org web site within a day, most posting words of encouragement and support, and the web site received the slashdot effect as a result. Miro CEO Peter Lamont gave a public response to the development team in an article titled "The Mambo Open Source Controversy - 20 Questions With Miro". This event created controversy within the free software community about the definition of "open source". Forums at many other open source projects were active with postings for and against the actions of both sides.
In the two weeks following Eddie's announcement, teams were re-organized, and the community continued to grow. Eben Moglen and the Software Freedom Law Center (SFLC) assisted the Joomla! core team beginning in August 2005, as indicated by Moglen's blog entry from that date and a related OSM announcement.[7][8] The SFLC continue to provide legal guidance to the Joomla! project.
On August 18, 2005, Andrew Eddie called for community input on suggested names for the project. The core team indicated that it would make the final decision for the project name based on community input. The core team eventually chose a name that was not on the list of suggested names provided by the community.

A pplication development firm with a head office in Tehran, Iran.16 full time employees and more than 20 part time consultants
 
6 . Full range of application development skills - architecture, design, development and support.