i have a few casio/casiotone keyboards and got curious as to many things about them - why as time passed some elements of them advanced, and some receded, what they were initially actually designed for, a full list of models and specific and general stuff like that.
i thought wikipedia would help, and it gave a bit of background on the casio corporation which was nice, but does anyone here consider themselves an expert on casios (button??) or know a good book about them? or good articles online? or just general resources on them?