Jack Dorsey days, Dorsey worked occasionally as a fashion model. By age fourteen, Dorsey had become interested in dispatch routing. Some of the open-source software he created in the area of dispatch logistics is still used by many taxi cab companies. Dorsey attended the University of Missouri–Rolla for two-plus years (1995–1997) before transferring to New York University, but he dropped out in 1999, one semester short of graduating. He first came up with the idea that he developed as Twitter while studying at New York University. While working on dispatching as a programmer, Dorsey moved to California. In 2000, Dorsey started his
Social media use by businesses and social media. Though community-owned, some community radio, TV, and newspapers are run by professionals and some by amateurs. They use both social and industrial media frameworks. Social media has also been recognized for the way they have changed how public relations professionals conduct their jobs. They have provided an open arena where people are free to exchange ideas on companies, brands, and products. Doc Searls and David Wagner state that the "...best of the people in PR are not PR types at all. They understand that there aren't censors, they're the company's best conversationalists." Social media provides an environment