Coded Decimal Number Systems for Digital Computers

In this paper, basic properties of coded decimal number systems are presented, extending the discussion of "Synthesis of Electronic Computing and Control Circuits." From the very large numbers of possible ways of coding the ten decimal digits into sets of binary elements, a restricted group of number systems is presented as being particularly adaptable for representing the decimal digits in digital computers. As an example, one number system of this group is presented which permits the construction of a very simple addition circuit.