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Message * Articles On Programmable Calculators, including Ti-89 Series, Ibm 604, Wang Laboratories, Harvard Mark I, Remington Rand 409, Ibm 632, Hp-48 Series, Hp-49 Series, Graphing Calculator, Ti-92 Series, Ti-83 Series, Hp-65, Ti-86, Ti-85 - 1242976477 - 9781242976476