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Yahoo
https://www.yahoo.com/
Yahoo Inc. is an American multinational technology company headquartered in Sunnyvale, California. -
Google
Google is an American multinational technology company specializing in Internet-related services and products that include online advertising technologies, search, cloud computing, and software. -
Facebook
https://www.facebook.com/
Facebook is a for-profit corporation and online social media and social networking service based in Menlo Park, California, United States. Wikipedia -
Youtube
https://www.youtube.com
YouTube is an American video-sharing website headquartered in San Bruno, California, United States. The service was created by three former PayPal employees in February 2005. -
Twitter
https://twitter.com/?lang=en
Twitter is an online social networking service that enables users to send and read short 140-character messages called "tweets". -
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