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The fuller name, Okapi BM25, includes the name of the first system to use it, which was the Okapi information retrieval system, implemented at London's City University[1] in the 1980s and 1990s
[7] It was initially available for download from its home at the SourceForge web site
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com/search-console/about" , "snippet" : "Search Console tools and reports help you measure your site's Search traffic and performance, fix issues, and make your site shine in Google Search results
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com/world/asia-pacific/indonesia-bans-search-engine-duckduckgo-gambling-pornography-concerns-2024-08-02/ |url-status=live }}</ref> and [[China]]<ref>{{Cite web|title=DuckDuckGo joins Google in being blocked in China|url=https://www