WP 31S User's Manual: v1.2

By Walter Bonin

This manual documents WP 31S, a free software you can use for converting an HP-20b or HP-30b financial calculator of Hewlett-Packard into a clean and compact scientific and engineering problem solver. WP 31S is a derivative of the WP 34S being on the market since 2011. It was designed to be the entry model of the family of WP RPN calculators. Firmware and user interface of WP 31S were thoroughly designed, written, and tested by us, creating a new straight and compact technical problem solver that fits comfortably in your shirt pocket. It readily offers you: a complete set of mathematical functions for solving engineering and scientific problems; a full-fledged UNDO (for the first time ever on an RPN pocket calculator); an ample set of statistical operations, including curve fitting and forecasting; probability distributions like Gaussian, Fisher's F, Student's t, chi-square, Poisson, binomial, Weibull, and more; over 50 fundamental physical constants as accurate as they are used today by national standards institutes such as NIST or PTB, plus a selection of important constants from mathematics, astronomy, and surveying; over 80 unit conversions, most of them from old British Imperial to universal SI units and vice versa; battery-fail-safe on-board backup memory for your data. Furthermore, your WP 31S provides ample space for your calculations: a choice of 4 or 8 stack levels (4 for compatibility with vintage HP calculators, 8 for absolutely worry-free computing of even the most complex formulas you will ever meet), up to 17 general purpose registers for permanently storing your data, and 14 dedicated statistics registers for whatever you want to accumulate. WP 31S is optimized for manual problem solving: it shows a very clean layout so you find all you need at first view easily. Nevertheless it offers you over 340 functions - this compact 150-page manual explains all of them. It includes many pictures and examples - everything you want to know also about creating, flashing, and updating your WP 31S. Recommended for any serious science or engineering student as well as for professionals in these areas.

• Format: Paperback
• Language: English
• ISBN: 1499231164
• ISBN13: 9781499231168
• Release Date: December 2014
• Publisher: CreateSpace Independent Publishing Platform
• Length: 150 Pages
• Weight: 0.62 lbs.
• Dimensions: 9.0" x 0.4" x 6.0"