Twitter on March 21, 2006, when Dorsey published the first Twitter message at 9:50 p.m. Pacific Standard Time (PST): "just setting up my twttr". Dorsey has explained the origin of the "Twitter" title: ...we came across the word 'twitter', and it was just perfect. The definition was 'a short burst of inconsequential information,' and 'chirps from birds'. And that's exactly what the product was. The first Twitter prototype, developed by Dorsey and contractor Florian Weber, was used as an internal service for Odeo employees and the full version was introduced publicly on July 15, 2006. In October 2006, Biz Stone, Evan
Jack Dorsey hundred employees by June 2011. Square's office is located on Market Street in San Francisco. In September 2012, "Business Insider" magazine valued Square Inc. at US$3.2 billion. Dorsey is CEO of Square, Inc. On October 14, 2015, Square filed for an IPO to be listed on the New York Stock Exchange. As of that date, Dorsey owned 24.4% of the company. Producer Tom Anderson and correspondent Lara Logan interviewed Dorsey for a segment of CBS "60 Minutes" called "The Innovator: Jack Dorsey" which aired during March 2013. In 2013, talking to CNN, Dorsey expressed admiration for Michael Bloomberg and his