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September 2020

Web crawler
Web crawler, sometimes called a spider or spiderbot and often shortened to crawler, is an Internet bot that systematically browses the World Wide Web
WebCrawler is a web search engine, and is the oldest surviving search engine on the web today. For many years, it operated as a metasearch engine. WebCrawler
Web search engine
algorithm on a web crawler. Internet content that is not capable of being searched by a web search engine is generally described as the deep web. The thought
Web scraping
implemented using a bot or web crawler. It is a form of copying, in which specific data is gathered and copied from the web, typically into a central local
Distributed web crawling
small crawler configuration, in which there is a central DNS resolver and central queues per Web site, and distributed downloaders. A large crawler configuration
Deep web
a hidden-Web crawler that used key terms provided by users or collected from the query interfaces to query a Web form and crawl the Deep Web content.
Focused crawler
A focused crawler is a web crawler that collects Web pages that satisfy some specific property, by carefully prioritizing the crawl frontier and managing
Googlebot is the web crawler software used by Google, which collects documents from the web to build a searchable index for the Google Search engine. This
Web server
scripts in addition to the text content. A user agent, commonly a web browser or web crawler, initiates communication by making a request for a specific resource
Wayback Machine
images. Due to this, the web crawler cannot archive "orphan pages" that contain no links to other pages. The Wayback Machine's crawler only follows a predetermined