Web Scraping vs Screen Scraping

Web scraping is traditionally where we tryin collect information, prickly text and often tables from a web site. Screen scraping is roughly the same, but i guess a bit more a broader term for collecting all the information that you see on a screen from a web sites. Crawling is is very similar, but in that instance, or less interested in the content that's on the web page or the web side, and more interested in the links that exist on a web side.