reaming service that includes chat about games and video game competitions. It also offers streaming of select Saturday Night Live shows on which people can comment. Audible.com: Audio books. Whole Foods Market: 400 supermarkets throughout the U.S. This is Amazon's largest purchase at over $40 billion. Alexa Internet: Home automation; includes the smaller Echo. Amazon Game Studio: Online game development. Amazon Studios: Producer of original online content for streaming. www.TechnicalPDF.com Internet Movie Database (IMDB): Online movie reviews. Zappos: Online shoes and clothing retailer. Blink: Home security camera that can be used with Amazon Key to monitor Amazon deliveries to homes with special locks that can be opened by drivers. Blink cameras will monitor deliveries left inside the home. Ring: Video doorbells for smart, automated homes. Music: Streaming music. ComiXology: An online platform for sales of thousands of comic books. In addition to the above purchases, Amazon is testing the provision of supplies to hospital chains and individual hospitals. They have also announced Shipping with Amazon, a service in tests in Los Angeles where Amazon vehicles will pick up packages from businesses and deliver them to the end users. Facebook-An Influential Social Network Facebook is the largest social network in the United States. Its primary source of revenue is advertising. Facebook, which was launched in 2004 by Mark Zuckerberg and Eduardo Severin, was in its early years primarily a vehicle for college students to interact with each other. It has morphed into an enormous social network with over two billion users where primarily adults exchange information and update each other with news about themselves. To attract additional advertising, Facebook has taken steps to attract younger people to its site. Their subsidiary Instagram is a vehicle for people to socialize and exchange photos and short videos. It adopted some of the same features that Snapchat originally implemented. See below for information on Snapchat.