ORS, also known as Orlando Riva Sound, was a German Euro disco group in the late 1970s and early 1980s. Their musical style incorporated elements of disco, pop, and electronic music, making them a significant contributor to the Euro disco genre. The group was founded by Anthony Monn and Rainer Pietsch, both of whom were notable figures in the German music scene. ORS is best known for their hit single "Moon Boots", which showcased their signature synthesis of melodic hooks and danceable rhythms.