Kluster was a Berlin-based German experimental musical group formed in 1969 by Hans-Joachim Roedelius, Conrad Schnitzler, and Dieter Moebius. Their improvisational work presaged later industrial music. The original Kluster was short-lived, existing only from 1969 until mid-1971 when Conrad Schnitzler left and the remaining two members renamed themselves Cluster. Schnitzler later revived the band from 1971 to 1973 and then from 2007 until his death in 2011.

From Wikipedia

Wikipedia content provided under the terms of the Creative Commons BY-SA license