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The HP-10B (F1636A) is a student business calculator introduced in 1988. The model of this calculator proved to compete well with the higher end RPN HP-12C. Two versions of the 10B were produced, the first version came with orange lettering around the keys, the later model (in 2000) with teal-green labels.〔http://www.hpmuseum.org/cgi-sys/cgiwrap/hpmuseum/archv004.cgi?read=6738〕 The functionality of the two versions appears to be identical. The successor HP 10bII (F1902A), which was introduced in 2001, is essentially a cosmetic upgrade offering the same overall functionality, but actually reduces the available numbered-storage registers from 15 to 10. Early production runs were of poor quality; newer calculators have apparently solved this shortcoming. In 2011, the 10bII was replaced by the HP 10bII+ (NW239AA) model 1 with expanded capabilities. This model also allows chain input. The 10bII+ uses a flashable Atmel AT91SAM7L128〔http://media.digikey.com/pdf/PCNs/Atmel/RE133101_AT91SAM7Lxx_Obs.pdf〕〔http://media.digikey.com/pdf/PCNs/Atmel/RE133101_AT91SAM7Lxxx_Retract.pdf〕〔http://media.digikey.com/pdf/PCNs/Atmel/SE133406A_Obs.pdf〕〔http://media.digikey.com/pdf/PCNs/Atmel/RE150402.pdf〕〔http://www.brouhaha.com/~eric/hpcalc/voyager/variants.html〕 processor with ARM7TDMI core.〔http://www.hpmuseum.org/cgi-sys/cgiwrap/hpmuseum/archv020.cgi?read=183953〕 In 2015, the internal hardware of the HP 10bII+ changed to use an Atmel ATSAM4LC2CA processor with ARM Cortex-M4 core.〔 The part number and physical appearance of model 2 didn't change except for a "Rev 2" plate on the bottom side.〔 The serial numbers of the new model start with "PHA".〔 The 2×3-pin flash port now uses the USB protocol instead of a TTL serial protocol.〔http://www.hpmuseum.org/forum/thread-5171-post-46001.html〕 None of the five models supports RPN. ==See also== * List of Hewlett-Packard products: Pocket calculators * HP calculators 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-10B」の詳細全文を読む スポンサード リンク
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