sign was first seen in the 1960s although it was not extensively used
until the 1980s. It is called the smile or acid sign. Acid, apart from being a word for the
drug LSD, denotes a music style, a
strange, dance provoking blend of American soul and European disco
Thus the music, the sign, and its name, acid, are somewhat associated with the pleasure drug ecstasy and the psychedelic drug LSD. This sign, however, is also the logotype for the international ecology organization Asian Pals of the Planet.
This sign is also drawn .