Google is shuttering Reader, a product which allows people to quickly skim and read news articles from websites, as of July 1.

News-reader apps like Google Reader, which use a technology called RSS, or Really Simple Syndication, never got to critical mass. But they are used ferociously by people in the media and technology insiders, who depend on them to keep track of a large number of news sources. So they're very upset, judging by the stunned reaction on Twitter. People are tagging their posts with "#savegooglereader" to signal their support for the product.