Joomla! is an open source content management system platform 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. Joomla is used by over 20 of the top 10,000 most popular websites on the internet.

The best place to know about is : http://www.joomla.org/about-joomla.html

 

Joomla.org is the officeal website for Joomla Team, you can learn, discuss & Joomla latest version from the website.

 

Joomla is an award-winning content management system (CMS), which enables you to build Web sites and powerful online applications. Many aspects, including its ease-of-use and extensibility, have made Joomla the most popular Web site software available. Best of all, Joomla is an open source solution that is freely available to everyone. A content management system is software that keeps track of every piece of content on your Web site, much like your local public library keeps track of books and stores them. Content can be simple text, photos, music, video, documents, or just about anything you can think of. A major advantage of using a CMS is that it requires almost no technical skill or knowledge to manage. Since the CMS manages all your content, you don't have to.

 

If you have any special question about Joomla or Its security, please post on Joomla forum or use our contact us page, we will be happy to answer your question, thank you.