By 2005, LinkedIn founder Hoffman…

By 2005, LinkedIn founder Hoffman and his co-founders, Allen Blue, Konstantin Guericke, Eric Ly and Jean-Luc Vaillant, had launched three revenue streams – job listings, #subscriptions and advertising. By the next year, #LinkedIn was profitable, and today they are headquartered in Mountain View, CA.

Why LinkedIn? According to the founder, this name is equally straightforward. Joining allows you to get linked (or connected) in(to) your professional #network.