ete ▁directly ▁with ▁American ▁manufact ur ers . ▁Sin tr an ▁III ▁was ▁launched ▁as ▁a ▁further ▁development ▁of ▁Sin tr an ▁II ▁which ▁included ▁Nord - T SS ▁and ▁introduced ▁virtual ▁memory , ▁which ▁was ▁launched ▁with ▁a ▁new ▁generation ▁of ▁hardware , ▁the ▁Nord - 1 0 , ▁in ▁ 1 9 7 3 . ▁C ER N ▁later ▁followed ▁up ▁with ▁purch asing ▁a ▁Nord - 1 0 ▁in ▁ 1 9 7 5 ▁for ▁their ▁largest ▁department . ▁Add itional ▁orders ▁were ▁made ▁and ▁by ▁the ▁end ▁of ▁ 1 9 7 6 ▁C ER N ▁were ▁operating ▁fifty ▁N D ▁computers . ▁The ▁delivery ▁to ▁C ER N ▁combined ▁with ▁a ▁more ▁efficient ▁software ▁port folio ▁with ▁the ▁Nord - 1 0 ▁were ▁key ▁factors ▁in ▁the ▁continued ▁growth . ▁For ▁instance , ▁N D ▁delivered ▁a ▁turn - key ▁system ▁for ▁meteor ology ▁in ▁Al ger ia ▁in ▁ 1 9 7 4 , ▁complete ▁with ▁software ▁developed ▁in - house . ▁Half ▁the ▁company ' s ▁re venue ▁came ▁from ▁international ▁sales ▁that ▁year . ▁ ▁Market ▁orientation ▁Nor sk ▁Data ▁continued ▁to ▁und erm ine ▁market ing ▁until ▁the ▁mid - 1 9 7 0 s . ▁Sales ▁personnel ▁had ▁low ▁w ages , ▁little ▁to ▁no ▁influence ▁on ▁product ▁development , ▁high ▁turn over , ▁and ▁were ▁often ▁trained ▁in ▁engineering ▁rather ▁than ▁business . ▁In ▁the ▁first ▁years , ▁N D ▁sales ▁represent atives ▁wore ▁je ans ▁and ▁would ▁present ▁the ▁products ▁to