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ETR MACHINES: ETR MACHINE DATECS DP50 SIMPLIFIED MANUAL etrmachines.blogspot.com/2014/03/etr-machine-datecs-dp50-simplified.html?spref=tw.etrkradejavutechologiestltd etrmachines f t. KRA Approved ETRs, CCTV Systems, POS Systems and Computers. DATECS DP-50 USER MANUAL. MAKING A SALE IN DP50. INTRODUCTION This manual presents the technical and functional characteristics of electronic cash register DP-50 / DP-50D / MP-55B and its modes of