PPG

a reference to PPG Industries, Inc., an American company founded in 1883 in Pennsylvania, as the Pittsburgh Plate Glass Company. The company was originally established as a manufacturer of plate glass (thick glass rolled into flat plates and used for windows, mirrors, etc.). It expanded its operations and became a global producer of fiberglass, fabricated glass products, automotive coatings and chemicals. In 1968 in recognition of its growth and diversification it changed its name to PPG Industries.