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'OCTOMETRIC' Octometric is the metric (measurement) system obtained by applying the generalized metric concept to the octal arithmetic system (octo-arithmetic). The octal arithmetic system (OAS)is the arithmetic system simply obtained by redefining 10 (ten) as one more than 7 (or 7+1). The digits 8 and 9 are not used in OAS. Some of the basic addition sums and multiplication products are different in octal. Decimal arithmetic (10 = 7+1). All of the various operations and concepts that are found in decimal arithmetic have a parallel in octo-arithmetic with a parallel computational definition (for example. addition, long division, and square root). Octal addition table is shown in Appendix A with a 2nd table indicating the differences between decimal and octal. Octal subtraction is simply inverse octal addition. The octal additive identity is zero (same as decimal). Octal multiplication is multiple (repeated) octal addition (see example in Appendix B for long octal multiplication). The octal multiplicative identity is 1 (same as decimal). Octal division is the inverse of octal multiplication or multiple (repeated) octal subraction