Traditional Culture Encyclopedia - Traditional customs - Basic types of retrieval tools
Basic types of retrieval tools
1. Manual retrieval tools: printed secondary documents, such as catalogues, indexes and abstracts.
2. Mechanical retrieval tools: mainly refer to the technical equipment of electronic computer information retrieval system.
3. Search engines: including Google, Baidu, Bing, etc. Users can get relevant search results by inputting keywords.
4. Directory and classified index: for example, Yahoo Directory, DMOZ, etc. They will classify websites according to topics and categories, and provide a directory structure to help users browse and search related content.
5. Meta search engines: for example, Dogpile, MetaCrawler, etc. , the results of calling multiple search engines at the same time will be presented to users together.
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