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The Hewlett-Packard Voyager series of calculators were introduced by Hewlett-Packard in 1981. All members of this series are programmable, use Reverse Polish Notation, and feature continuous memory. Nearly identical in appearance, each model provided different capabilities and was aimed at different user markets. The HP calculators Voyager series consisted of five models, some of which were manufactured in several variants (with years of production): *HP-10C – basic scientific calculator (1982–1984). *HP-11C – mid-range scientific calculator (1981–1989). *HP-12C – business/financial calculator (1981–present). *HP-15C – advanced scientific calculator (1982–1989, 2011). *HP-16C – computer programmer's calculator (1982–1989). The HP-12C and its derivatives remains in widespread use today and is still available from Hewlett-Packard. The long-discontinued HP-15C was re-released in a "Limited Edition" in 2011 that has again been discontinued. ==HP-10C== The HP-10C is the last and lowest-featured calculator in this line, even though its number would suggest an earlier origin. The 10C was a basic scientific programmable. While a useful general purpose RPN calculator, the HP-11C offered twice as much for only a slight increase in price. Designed to be an introductory calculator, it was still costly compared to the competition, and many looking at an HP would just step up to the better HP-11C. Poor sales led to a very short market life, making it one of the most difficult of the series to find today. 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「Hewlett-Packard Voyager series」の詳細全文を読む スポンサード リンク
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