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The HP-67 was a magnetic card-programmable handheld calculator, introduced by Hewlett-Packard in 1976 at an MSRP of $450.〔(【引用サイトリンク】title=The Museum of HP Calculators: HP-67/97 ) US$450 in 1976 ≈ US$1,680 in 2009 (see (The Inflation Calculator ))〕 A desktop version with built-in thermal printer was sold as the HP-97 at a price of $750.〔(【引用サイトリンク】title=HP Virtual Museum: HP-97 programmable printing calculator, 1976 ) US$750 in 1976 ≈ US$2,800 in 2009 (ibid.)〕 Marketed as improved successors to the HP-65, the HP-67/97 were based on the technology of the "20-series" of calculators (HP-25, HP-19C etc.) introduced a year earlier. The two models are functionally equivalent, and programs on magnetic cards can be interchanged between them. == Features == The 67/97 provide a complete set of scientific, statistical and engineering operations, including trigonometrical, logarithmic and exponential functions, coordinate conversions, average/standard deviation etc. The HP-67/97 series featured a program memory of 224 eight-bit words. The two extra bits per word compared to the HP-65's six allowed the designers to store any program instruction in a single memory cell ("fully merged keycodes") even if it required multiple keystrokes to enter (see image). Programs could include 20 labels, subroutines (3 levels deep), four flag registers, 8 comparison functions, and extended index and loop control functions. At 15 digits, the display was wider than those of the predecessor models, although the decimal point was displayed on its own digit position. The HP-67 keys carry up to four functions each, accessed through "f", "g" and "h" prefix keys (gold, blue and black labels, respectively). The model 97 had more (and larger) keys, therefore only two functions were assigned to each key. When interchanging magnetic cards between the HP-67 and the HP-97, the calculators' software took care of converting the key codes, and emulated the 97's print functions through the 67's display. The HP-67 is powered by a pack of three AA-sized nickel-cadmium rechargeable batteries. Owing to the power requirements of the built-in thermal printer, the HP-97 employs a larger battery pack and more powerful charger. 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-67/-97」の詳細全文を読む スポンサード リンク
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