LinkedIn - Is a business-oriented social networking service used for professional networking. The LinkedIn headquarters is located in Mountain View, California run by current CEO Jeff Weiner. With 300 million users it makes LinkedIn the world’s largest professional network. They are publicly traded on the NYSE under LNKD. LinkedIn allows the user to create a professional profile highlighting skills and job experiences. The user is then able to make “connections” to other users to build their network. Once connected to another user they may view your profile and potentially offer internship or job opportunities.