Summary:Web search engines work by storing information about a large number of web pages, which they retrieve from the WWW itself. Keywords:search engine, internet, technology, science history Article Body:A search engine operates, in the following order: 1) Crawling; 2) Deep Crawling Depth-first search (DFS); 3) Fresh Crawling Breadth-first search (BFS); 4) Indexing; 5) Searching. Web search...