It's the nature of Internet manias: they tend to leave almost as fast as they come, with only the rarest of rages sticking around for the long haul. Of the Internet "in things" that have remained "in," perhaps the most surprising is the humble Web log, or blog. This is a kind of digital diary, a Web page to which a writer posts chronological entries on a particular topic. The main difference between a blog and a regular Web site is that the blog's information is updated frequently, often several times a day or more.
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