Eris O.

WordPress is a free and open source blogging tool and content management system (CMS) powered by PHP and MySQL. It has many features including a plug-in architecture and a template system. wikipedia.org

Web development is a broad term for the work involved in developing a web site for the Internet (World Wide Web) or an intranet (a private network).

Web design is the process of planning and creating a website. Text, images, digital media and interactive elements are used by web designers to produce the page seen on the web browser. wikipedia.org

A system administrator, or sysadmin, is a person who is responsible for the upkeep, configuration, and reliable operation of computer systems; especially multi-user computers, such as servers. wikipedia.org

WP e-Commerce is a WordPress plugin that provides tools for users to start selling products, downloads or services online. WordPress is a free and open source blogging tool and content management system (CMS) based on PHP and MySQL.

Web analytics is the measurement, collection, analysis and reporting of web data for purposes of understanding and optimizing web usage.

A multisite network can be very similar to your own personal version of WordPress.com. End users of a Wordpress multisite network can create their own sites on demand, just like end users of WordPress.com can create blogs on demand.

A web hosting service is a type of Internet hosting service that allows individuals and organizations to make their website accessible via the World Wide Web.

Systems analysis is the study of sets of interacting entities, including computer systems analysis. wikipedia.org