2. Screen scraping
Web-spider describes automated moving spiders. That web index
device draws information off the web in an organized and
systematic way by checking the web for vital information that will
help us achieve the info extraction goals. Unlike all search-
engines that have their very own spiders to serve an over-all
purpose strategy web index crawls the web for collecting certain
data. It may be in regards to a specific field, business, class, an
such like.