Corning Incorporated is an American manufacturer of glass, ceramics, and related materials, primarily for industrial and scientific applications. The company was known as Corning Glass Works until 1989, when it changed its name to Corning Incorporated. In 1998, Corning divested itself of its consumer lines of CorningWare and Corelle tableware and Pyrex cookware selling them to World Kitchen, but still holds an interest of about 8%. As of 2014[update], Corning had five major business sectors: Display Technologies, Environmental Technologies, Life Sciences, Optical Communications, and Specialty Materials. Corning is involved in two joint ventures: Dow Corning and Pittsburgh Corning. Quest Diagnostics and Covance were spun off from Corning in 1996.