ert werke ▁( SS W , ▁founded ▁in ▁ 1 9 0 3 ) ▁and ▁S iem ens - Re in iger - W er ke ▁( SR W , ▁founded ▁in ▁ 1 9 3 2 ) ▁merged ▁to ▁form ▁S iem ens ▁AG . ▁In ▁ 1 9 6 9 , ▁S iem ens ▁formed ▁Kraft werk ▁Union ▁with ▁A EG ▁by ▁pool ing ▁their ▁nuclear ▁power ▁business es . ▁ ▁The ▁company ' s ▁first ▁digital ▁tele phone ▁exchange ▁was ▁produced ▁in ▁ 1 9 8 0 . ▁In ▁ 1 9 8 8 , ▁S iem ens ▁and ▁G EC ▁acquired ▁the ▁UK ▁defence ▁and ▁technology ▁company ▁P les sey . ▁P les sey ' s ▁hold ings ▁were ▁split , ▁and ▁S iem ens ▁took ▁over ▁the ▁av ion ics , ▁rad ar ▁and ▁traffic ▁control ▁business es — as ▁S iem ens ▁P les sey . ▁ ▁In ▁ 1 9 8 5 , ▁S iem ens ▁bought ▁All is - Ch al mers ' ▁interest ▁in ▁the ▁partners hip ▁company ▁S iem ens - All is ▁( formed ▁ 1 9 7 8 ) ▁which ▁supplied ▁elect rical ▁control ▁equipment . ▁It ▁was ▁incorpor ated ▁into ▁S iem ens ' ▁Energy ▁and ▁Autom ation ▁division . ▁ ▁In ▁ 1 9 8 7 , ▁S iem ens ▁re integr ated ▁Kraft werk ▁Union , ▁the ▁unit ▁over see ing ▁nuclear ▁power ▁business . ▁ ▁In ▁ 1 9 8 9 , ▁S iem ens ▁bought ▁the