The Aeolian Company was a musical-instrument making firm whose products included player organs, pianos, sheet music, records and phonographs. Founded in 1887, it was at one point the world's largest such firm. During the mid 20th century, it surpassed Kimball to become the largest supplier of pianos in the United States, having contracts with Steinway & Sons due to its Duo-Art system of player pianos. It went out of business in 1985.