Atco was a subsidiary of Ahmet Ertegün’s Atlantic label, which played a big role in ushering in the rock and roll era by providing a home for acts like the Drifters, the Clovers and Joe Turner. Atco was for artists such as Bobby Darin, who didn’t fit into the genre of music that Atlantic was putting out—blues, rhythm and blues, and jazz. The Coasters, the Sensations, the Who, the Buffalo Springfield, Sonny & Cher and even the Beatles had songs issued on Atco.
Thanks for the great trivia.