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Hotmail
Social Networking, One of the first web based email services.
Created by Sabeer Bhatia and Jack Smith -
Google
World wide search engine.
Created by Larry Page and Sergey Brin in Menlo Park, California -
Wikipedia
Encyclopedia
Created by Jimmy Wales and Larry Sanger -
Facebook
Social Networking
Created by Mark Zuckerberg -
Youtube
Video hosting service
Created by Chad Hurley, Steve Chen and Jawed Karim in San Bruno, California