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The "35" in the calculator's name came from the number of keys. The original HP-35 was available from 1972 to 1975. In 2007 HP announced the release of the "retro"-look HP 35s to commemorate the 35th anniversary of the launch of the original HP-35. It was priced at US$59.99. [3] The HP-35 was named an IEEE Milestone in 2009. [4]
The HP 35s (F2215A) is a Hewlett-Packard non-graphing programmable scientific calculator. Although it is a successor to the HP 33s, it was introduced to commemorate the 35th anniversary of the HP-35, Hewlett-Packard's first pocket calculator (and the world's first pocket scientific calculator).
HP's first scientific calculator, HP-35 With this in mind, HP built the HP 9100 desktop scientific calculator. This was a full-featured calculator that included not only standard "adding machine" functions but also powerful capabilities to handle floating-point numbers, trigonometric functions , logarithms, exponentiation, and square roots .
In 1972, Hewlett-Packard launched the HP-35, the world's first handheld scientific calculator. [1] Despite market research suggesting that it was too expensive for there to be any real demand, production went ahead. [2] It cost US$395 (about £165), but despite the price, over 300,000 were sold in the three and a half years for which it was ...
The HP-45 is the second scientific pocket calculator introduced by Hewlett-Packard, adding to the features of the HP-35. It was introduced in 1973 [1] with an MSRP of US$395 [2] (equivalent to $2,798 in 2024). [3] Especially noteworthy was its pioneering addition of a shift key that gave other keys alternate functions.
He joined Hewlett-Packard in 1967, where he helped develop the HP-35, the first handheld electronic scientific calculator, and was a lecturer at Santa Clara University. He later joined Apple as employee 15, [ 2 ] and in 1978 became executive vice president of engineering, working directly with Steve Jobs and Jef Raskin on the Macintosh project.
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The $395 HP-35, along with nearly all later HP engineering calculators, uses reverse Polish notation (RPN), also called postfix notation. A calculation like "8 plus 5" is, using RPN, performed by pressing 8, Enter↑, 5, and +; instead of the algebraic infix notation: 8, +, 5, =. It had 35 buttons and was based on Mostek Mk6020 chip.
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