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HP 39/40 series are graphing calculators from Hewlett-Packard, the successors of HP 38G. The series consists of six calculators, which all have algebraic entry modes, and can perform numeric analysis together with varying degrees of symbolic calculation. All calculators in this series are aimed at high school level students and are characterized by their ability to download (via cable or infra-red) APLETs or E-lessons. These are programs of varying complexity which are generally intended to be used in the classroom to enhance the learning of mathematics by the graphical and/or numerical exploration of concepts. ==HP 39G== The HP 39G (F1906A) was released in 2000. Basic characteristics: * CPU: 4 MHz Yorke (Saturn core) * Communication: Proprietary infrared, Serial RS-232 (Serial port). * Memory: 256 KB * Screen resolution: 131×64 pixels * Includes a hard cover * Limited symbolic equation functionality. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「HP 39/40 series」の詳細全文を読む スポンサード リンク
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