Wordpress in the World Wide Web

What is the purpose of Wordpress.org?On this site you can download and install a software script called WordPress. To do this you need a web host who meets the minimum requirements and a little time. WordPress is completely customizable and can be used for almost anything.

What is the purpose of Wordpress.com?There is also a service called WordPress.com which lets you get started with a new and free WordPress-based blog in seconds, but varies in several ways and is less flexible than the WordPress you download and install yourself.

How did Wordpress originate?WordPress was born out of a desire for an elegant, well-architectured personal publishing system built on PHP and MySQL and licensed under the GPLv2 (or later). It is the official successor of b2/cafelog. WordPress is fresh software, but its roots and development go back to 2001. It is a mature and stable product. We hope by focusing on user experience and web standards we can create a tool different from anything else out there.

What is wordpress based on?It is based off of PHP and MySQL. 

What is a CMS?A content management system, or CMS, is a web application designed to make it easy for non-technical users to add, edit and manage a website. 
7 Well-Known Sites that use CMS
The New Yorker
BBC America
MTV News
Best Buy
Facebook Newsroom
Google Ventures
Expressjet Airlines

What percent of the top 10 million websites use Wordpress?

44% of the top 100 million and 40% of the top 10 million.