Before revision: 250px|Five-pin male 180° DIN connector from a 1988 Schneider MF2 keyboard by Cherry The DIN connector is an electrical connector that was standardized by the (DIN), the German Institute for Standards, in the early 1970s, although it was already in use by the mid 1960's .
After revision: 250px|Five-pin male 180° DIN connector from a 1988 Schneider MF2 keyboard by Cherry The DIN connector is an electrical connector that was standardized by the (DIN), the German Institute for Standards, in the mid 1950's, initial with 3 pins for mono, but when stereo connections and gear appeared in late 1950's ( 1959 or so), versions with 5 pins or more were launched .