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<< Back to The World of Search Engines A vertical search engine searches a specific industry, topic, type of content (e.g., travel, movies, images, blogs, live events), piece of data, geographical location, and so on. It may help to think of vertical search as a search for a particular niche. Some of this content cannot be found, or is difficult to find, on general search engines. For this reason, the topic of vertical search is closely related to that of the deep Web .
This page contains a representative list of major databases and search engines useful in an academic setting for finding and accessing articles in academic journals , repositories , archives, or other collections of scientific and other articles. As the distinction between a database and a search engine is unclear for these complex document retrieval systems , see: the general list of search engines for all-purpose search engines that can be used for academic purposes bibliographic databases for information about databases giving bibliographic information about finding books and journal articles. Note that "free" or "subscription" can refer both to the availability of the database or of the journal articles included.
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