Fred Lang, who founded IT-staffing firm Analysts International Corp. in 1966 and led it through the dot-com boom, died at age 89. Lang passed away from kidney failure June 14, the Star Tribune reports. Lang served as CEO of Edina-based Analysts International from its founding through 2002. By the time he retired, Analysts had grown to about $550 million in revenue and had 3,800 employees in the U.S. and Canada. Analysts International's business slowed after the dot-com bubble burst, and last…