you have mentioned about a networking service above; who started it?
Mark Zuckerberg.
Facebook
Facebook (stylized as ) is an American online social media and social networking service based in Menlo Park, California, and a flagship service of the namesake company Facebook, Inc. It was founded by Mark Zuckerberg, along with fellow Harvard College students and roommates Eduardo Saverin, Andrew McCollum, Dustin Moskovitz, and Chris Hughes.

where did the blue and black dress come from The photo originated from a washed-out colour photograph of a dress posted on the social networking service Facebook. what was its actual colour? It was eventually confirmed as black and blue. was it explained scientifically? Yes, The differences in opinions are a result of how the human brain perceives colour, and chromatic adaptation.
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Facebook [SEP] Introduction
The name comes from the face book directories often given to American university students. Facebook can be accessed from devices with Internet connectivity, such as personal computers, tablets and smartphones. After registering, users can create a profile revealing information about themselves. They can post text, photos and multimedia which is shared with any other users that have agreed to be their "friend", or, with a different privacy setting, with any reader. Users can also use various embedded apps, join common-interest groups, buy and sell items or services on Marketplace, and receive notifications of their Facebook friends' activities and activities of Facebook pages they follow.