Decimal computer Decimal computer Decimal computers are computers which can represent numbers and addresses in decimal as well as providing instructions to operate on those numbers and addresses directly in decimal, without conversion to a pure binary representation. Some also had a variable wordlength, which enabled operations on numbers with a large number of digits. Early computers that were exclusively decimal include the ENIAC, IBM NORC, IBM 650, IBM 1620, IBM 7070. In these machines, the basic unit of data was the decimal digit, encoded in one of several schemes, including binary-coded decimal or BCD, bi-quinary, excess-3, and two-out-of-five code. Except for
Repeating decimal some other properties of repetends, see also. Various features of repeating decimals extend to the representation of numbers in all other integer bases, not just base 10: For example, in duodecimal, 1/2 = 0.6, 1/3 = 0.4, 1/4 = 0.3 and 1/6 = 0.2 all terminate; 1/5 = 0.2497 repeats with period 4, in contrast with the equivalent decimal expansion of 0.2; 1/7 = 0.186ᘔ35 has period 6 in duodecimal, just as it does in decimal. If "b" is an integer base and "k" is an integer, For example 1/7 in duodecimal: Which is 0.186ᘔ35 (base 12). Note that 10