The term describes groups such as yelworC and Placebo Effect, and was first used in December 1992 with the album announcement of Brainstorming, yelworC's debut.
Termín opisuje skupiny ako sú yelworC a Placebo Effect a bol prvýkrát použitý v decembri 1992 keď skupina yelworC vydala svoj debutový album Brainstorming.