Happy Birthday HP-35

[Valentin Albillo]

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Hi, all,

(01-04-2022 11:44 AM)Karl-Ludwig Butte Wrote:  The Heinz Nixdorf Forum honors the introduction of the HP-35 50 years ago today [...] Happy birthday, HP-35

Better late than never ... I'd like to contribute to the celebration of the HP-35's 50^th anniversary with these two documents from my site (click to view or download):

Long Live the HP-35

• 5-page article, belonging to my "Long Live" series, which is intended as a commemorative article for the HP-35's 35th anniversary, and I think you'll agree it's quite an original approach to it.
  
  It highlights all the groundbreaking capabilities of the HP-35 and their importance from a historical point of view, an further it includes three examples featuring four small "programs" (for a non-programmable calculator no less !), addressing such topics as root finding and numerical integration among others, as well as providing the appropriate historical context and a few personal anecdotes to spice it all. As you'll see, it's certainly a one-of-a-kind article.

HP Raw Scan - A Capability Study on the HP-35 Pocket Calculator

• (10-page PDF document) The HP-35 is a 35-key, pocket-sized scientific and engineering calculator. [...] In terms of general advantages, this unit provides much of the problem-solving power of a desktop scientific calculator, combined with the portability and convenience of the slide rule. Unlike the slide rule, it offers unprecedented accuracy and provides answers in a fraction of the time required for slide rule calculation.
  
  This Capability Report will explain and evaluate special features of Hewlett-Packard's HP-35 Pocket Calculators, typical applications with comparison of solution times (*), how the unit operates, advanced technological features and general specifications.
  
  (*) "The following problems were selected from engineering notebooks and were given to members of Hewlett-Packard's own engineering staff for solutions. Each engineer was asked to time himself in working each problem in two ways: first, with a pilot model of the HP-35, and second, by conventional slide rule methods. Actual results are shown with comparison times, together with keystrokes for the HP-35 and scratch notes required for arriving at the slide rule solutions."

V.