My use thus far has been cursory, but I look forward to exploring the features. I recently purchased the HP-15C clone called the DM15L. ![]() They knew a good product when they saw it and have saved the day by manufacturing a clone that seems nearly indistinguishable from the corresponding HP unit. These folks have taken the RPN baton and are running with it. It turns out that there is a manufacturer of Hewlett-Packard RPN clones called SwissMicros. My 12C now sits in the desk drawer with unused pens and paper clips. The HP-12C financial calculator is a wholly inadequate substitute for a scientific calculator. Only a few models remain on the market and several are financial calculators. It is quite intuitive to many of us and was a pleasure to use.īut, alas! The HP RPN calculator has largely gone out of fashion it seems. The beauty of the RPN system with its 4 register stack was that it could do fairly elaborate chain calculations without the need for parentheses or an equal key. Of course I refer to those made by Hewlett-Packard. I am highly protective of my beloved 11C so it rarely makes an appearance on the shop floor for fear of being damaged or destroyed.( Revised 8/1/22) I have been an enthusiastic user of RPN calculators since high school, when Gerry Ford was president. ![]() Now when at work if I am standing in front of a machine tool and want to add or subtract two numbers I whip out my phone rather than walk the 30 or 40 feet to my office and back. The majority of my use is simple number crunching and trig functions so I could not be considered a power user or expert on it but I am absolutely happy and satisfied with this app on my phone. I am absolutely thrilled to now have it on my phone so I have instant access to it 24/7 regardless of my location. I have been a machinist for 35 years so the one at work sees the lions share of use. I have three now, one at home, work, and on my boat. The transition was easy since I was not a calculator user prior to its acquisition. I purchased my first 11C probably around 1976 or so on the recommendation of my engineering student brother who explained the advantages of RPN to me. " įeel free to contact us if you need any support by visiting or simply email us at Stay tuned **** "This app supports complex numbers, intense calculations, matrix operations, and many other features that I don't have room to list. There’s even an in-app manual that features tutorial videos in case you’ve lost your touch." It uses the same Reverse Polish Notation entry system and supports the same mathematical functions. It mimics the look and feel of that classic number cruncher in every way possible. "Miss your old HP 11C RPN scientific calculator? Then give this utility app a try. Automatically save/restore settings during app close/start. ![]()
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