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Inorganic Crystal Structure Database. Interment.net. Internet Archive. Internet Broadway Database. Internet Movie Cars Database. Internet Movie Firearms Database. Internet Off-Broadway Database. Internet Public Library. Internet Speculative Fiction Database.
Search engines, including web search engines, selection-based search engines, metasearch engines, desktop search tools, and web portals and vertical market websites have a search facility for online databases.
The main academic full-text databases are open archives or link-resolution services, although others operate under different models such as mirroring or hybrid publishers. Such services typically provide access to full text and full-text search, but also metadata about items for which no full text is available.
This is a list of lists of websites, sorted by type and subject, including comparisons and other lists of lists. By type [ edit ] Academic databases and search engines
Comparison of web search engines. Web search engines are listed in tables below for comparison purposes. The first table lists the company behind the engine, volume and ad support and identifies the nature of the software being used as free software or proprietary software. The second and third table lists internet privacy aspects along with ...
When a search engine visits a site, the robots.txt located in the root directory is the first file crawled. The robots.txt file is then parsed and will instruct the robot as to which pages are not to be crawled. As a search engine crawler may keep a cached copy of this file, it may on occasion crawl pages a webmaster does not wish to crawl.
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