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
Cool Biz campaign In July 2009, the Cabinet Office announced results of a new questionnaire survey, which indicates that 91.8% of respondents knew about the Cool Biz campaign, and 57% of them put the campaign into practice. While Cool Biz spread energy savings to all businesses, the necktie business suffered. They claimed that their summer sales dropped drastically (an estimated 36%), and asked the Environment Minister to end the campaign. On the other hand, the Ministry of Economy, Trade and Industry (METI) analyzed that the Cool Biz campaign increases replacement demand for clothing and generates positive macroeconomic effects on the GDP by 18