For many years "safety technology" has constituted the essential instrument for the prevention of accidents as a direct result of handling new technology. Its awareness of the interactions prevalent in natural science causes safety technology to act on the basis of actual accidents, and it Ulilizes to their fullest extent any means provided by the engineering sciences. Man proceeds in a general direction towards preselVation and improvement, thus working towards the optimization of the technical design. However. a new set of basic problems presented itself the moment new large-scale...