WordPress is a system built on PHP and MySQL and licensed under the GPLv2.  It is an original software as well as a mature and established product. To make the everyday writing typography better WordPress was initiated in 2003 with a single bit of code and with very less users. Since then it has evolved to be the largest self-hosted blogging tool in the world, applied on millions of sites and seen by number of people every day.
The documentation to the code itself, was created by and for the community. WordPress is an Open Source in which hundreds of people all over the world are working and it is totally free. On this site you can download and install a software script called WordPress. For doing this we need a web host of minimum requirements and a small time. We can customize WordPress and can be used for almost anything. It also provide a service called WordPress.com through which we can start with a new and free blog in few time.
WordPress  has evolved to be used as full content management system with thousands of plugins, widgets, and themes.
Anyone can get involved with WordPress and become a volunteer at a WordCamp, which are free or low-cost events that happen all around the world to drawing together and teach WordPress users.