Commonly used search tools include search engines, databases, metasearch engines, directories, social media, readers, professional websites, etc. Detailed introduction: 1. Search engines: such as Google, Bing, Baidu, etc., can search and return relevant web pages, pictures, videos and other information based on the keywords entered by the user; 2. Databases: such as literature databases, patent databases, news databases Etc., these databases collect various types of information, and users can query through keywords, authors, topics, etc.; 3. Meta-search engines, etc.
#Commonly used search tools include the following:
- Search engine. For example, Google, Bing, Baidu, etc. can search and return relevant web pages, pictures, videos and other information based on the keywords entered by the user.
- database. For example, document databases, patent databases, news databases, etc. These databases collect various types of information, and users can query by keywords, authors, topics, etc.
- Meta search engine. For example, MetaCrawler, Dogpile, etc. do not directly retrieve information, but query multiple search engines at the same time and summarize the results together.
- Table of contents. For example, Yahoo directories, DMOZ, etc. These directories are constructed by manual classification and organization. Users can browse the directories to find relevant information.
- social media. For example, Twitter, Facebook, etc., users can obtain information of interest by following, subscribing, etc.
- Reader. For example, Feedly, Flipboard, etc., these tools can subscribe to RSS feeds, blogs and other information sources, and users can view all subscribed content in one application.
- Professional website. For example, Jiumo Search Books, etc. These professional websites can provide specific information retrieval services, such as e-book retrieval, image retrieval, etc.
The above is the detailed content of What are the commonly used search tools?. For more information, please follow other related articles on the PHP Chinese website!

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