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Reynolds, Barbara E. – College Mathematics Journal, 1993
Discusses the history of different methods of representing numbers and how these representations facilitated counting and computing devices such as the abacus. (MDH)
Descriptors: Arithmetic, Calculators, Coding, Computation

Ascher, Marcia – Mathematics Magazine, 1992
Discusses two mathematical ideas that come from the Incan and Mayan cultures: (1) the quipus, an Incan recordkeeping tool that encoded data via a logical-numerical system on spatial arrays of colored, knotted cords; and (2) the link between recording time and counting in the Mayan culture. (MDH)
Descriptors: Coding, Data Processing, Foreign Culture, Higher Education