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robots.txt is the filename used for implementing the Robots Exclusion Protocol, a standard used by websites to indicate to visiting web crawlers and other web robots which portions of the website they are allowed to visit.
A Web crawler, sometimes called a spider or spiderbot and often shortened to crawler, is an Internet bot that systematically browses the World Wide Web and that is typically operated by search engines for the purpose of Web indexing (web spidering).
The crawler, named the Meta External Agent, was launched last month according to three firms that track web scrapers and bots across the web. The automated bot essentially copies, or "scrapes ...
Dogpile is a metasearch engine for information on the World Wide Web that fetches results from Google, Yahoo!, Yandex, Bing, [2] [3] and other popular search engines, including those from audio and video content providers such as Yahoo!. [3]
Crawler-based search engines are those that use automated software agents (called crawlers) that visit a Web site, read the information on the actual site, read the site's meta tags and also follow the links that the site connects to performing indexing on all linked Web sites as well. The crawler returns all that information back to a central ...
HTTrack is a free and open-source Web crawler and offline browser, developed by Xavier Roche and licensed under the GNU General Public License Version 3. HTTrack allows users to download World Wide Web sites from the Internet to a local computer. [5] [6] By default, HTTrack arranges the downloaded site by the original site's relative link ...
Starting on April 7, 2003, Yahoo! Search became its own web crawler-based search engine. [8] They combined the capabilities of search engine companies they had acquired and their prior research into a reinvented crawler called Yahoo!. The new search engine results were included in all of Yahoo's websites that had a web search function.
The Web Bot gained most of its notoriety for contributing to the 2012 phenomenon by predicting a cataclysm that would devastate the planet on 21 December 2012, possibly a reversing of Earth's magnetic poles or a small series of nuclear attacks leading up to a major attack during the year. The prediction did not call for a complete end of the world.