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
What Is and What Should Never Be and What Should Never Be" was performed live at Led Zeppelin concerts between 1969 and 1973. A live version taken from a performance at the Royal Albert Hall in 1970 can be seen on the "Led Zeppelin DVD". Another was included on disc two of the live triple album "How The West Was Won". Two more versions were included in BBC Sessions. What Is and What Should Never Be "What Is and What Should Never Be" is a song by English rock band Led Zeppelin. It was written by Jimmy Page and Robert Plant and was included as the second