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In cosmic environment, heavy cosmic particles such as protons, neutrons, α-particles etc. with very high energy from solar winds penetrate the semiconductor chips in spacecraft/satellite digi- tal systems causing multiple random errors affecting the reliability of the system resulting in system failure thereby. Suzuki et al. [6] devised m-spotty byte error control codes for such situations and these codes are suitable for binary semiconductor chips with binary arith- metic. However, direct storage and processing of non-binary numbers in base 10, base 8, or base 16 is possible with the instant invention. Keeping this in view, in this paper, we formulate the concept of non- binary lt=b-spotty byte error control codes suitable for non-binary storage and computing and study error control properties of these codes. [ABSTRACT FROM AUTHOR]