English: The J. G. Brill Company manufactured streetcars and buses in the United States. The company was founded by John George Brill in 1868 as a horsecar manufacturing firm in Philadelphia, Pennsylvania, merged with the American Car and Foundry Company (ACF) in 1944 to become ACF-Brill and ceased production in 1954. Brill manufactured over 45,000 streetcars (also known in the U.S. as trolleys), buses, trolleybuses and railroad cars. At its height, it was the largest manufacturer of streetcars and interurbans in the U.S. It produced more streetcars and interurbans and gas electrics than any other manufacturer.