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Read also: 22 Ways to Get Traffic in a Complex Niche 6. Nigma " Nigma " is a Russian search engine that was launched in 2005. It was created by just two people: Viktor Lavrenko and Vladimir Chernyshev, the latter developing algorithms for "Nigma" at Stanford University. The search engine is named after the genus of spiders Nigma of the family Dictine weavers.


"Nigma" is a metasearch engine, and its search algorithm has several switzerland email list features. The search is conducted not only using Nigma's own index, but also through the indexes of Google, Yandex, Yahoo! and other search engines. Nigma creates several clusters of documents based on a search query, and the user can choose the results of which are interesting and where exactly to continue the search. This approach helps to increase the relevance of the results.


It is also possible to exclude certain clusters from the search, conducting it only on the remaining ones. Nigma supported Russian morphology in search even when Google couldn’t boast of it. In 2009, Nigma launched the service for schoolchildren, Nigma-Mathematics . The program not only solves the problem, but also shows the progress of its solution. In the same year, Nigma began creating a national search engine in Vietnam.