A blog is a type of Web site driven by regular entries of commentary (posts), which are maintained by either an individual or a group of authors. Blogging software is typically easy to administer, employing a rich-text editor for posting entries and pictures, and is recommended for beginners to expert Web users.

Posts are typically displayed in reverse-chronological order, and allow for reader comments that facilitate discussion on the topic at hand. Some blogs focus on providing information on a particular subject, whereas others serve as an ongoing online journal or diary. A typical blog includes text, images, links to other blogs (a blogroll), Web pages and other media (podcasts, videos, etc.) related to its topic. Additional functionality, often identified as "plug-ins" or "mods," can be added through the specific application's Web site.

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