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Vertical search, part of a larger subgrouping known as "specialized" search, is a relatively new tier in the Internet search industry consisting of search engines that focus on specific slices of content. The type of content in special focus may be based on topicality or information type. For example, a medical search engine would clearly be specialized in terms of its topical focus, whereas a video search engine would seek out results within content that is in a video format. So vertical search may focus on all manner of differentiating criteria, such as particular locations, multimedia object types and so on.