![]() For questions about me and the origin of the museum, please see my personal page. Quotations of HP manuals are Copyright Hewlett Packard Company - various years. The Museum of HP Calculators and the museum curator are not affiliated with the Hewlett-Packard Company. ![]() (Includes everything from the earliest HPs to the HP Prime, plus the new articles forum, new software forums and classifieds.) Other Hewlett Packard Calculators and computers.HP-67CX Unreleased RPN / HPL / Linux Scientific.The Xpander Unreleased Math Learning Aid.HP-42S RPN Scientific (HP-41C compatible).HP-32S RPN Scientific with Complex Math.HP-27S Algebraic Do Everything Calculator.HP-48S/SX Large Screen Scientifics with Symbolic Math.HP-28C/S Scientifics with Symbolic Math and Solver.RPL A Platform for Powerful Calculators.HP-16C The Computer Scientist Calculator.HP-15C Scientific with Matrix & Complex Math.HP-11C More Advanced Scientific Programmable.HP-10C Basic Scientific Programmable Calculator.The 10C series: Compact yet Sophisticated Calculators (1981) HP-94D/E/F Handheld Industrial Computer. ![]() HP-71B Even Smaller Computer/Calculator.HP-41C Alphanumeric Programmables (includes CV & CX).Small Computers and Computer-like Calculators (1979) HP-33E/C Scientific Programmable Calculator.Third Generation of HP Calculators (1978) HP-01 The Hewlett-Packard Calculator Watch.HP-67 & HP-97 Pocket & Desktop Calculators.Second Generation Mag Card Programmables (1976) HP-95C Unreleased Printing Programmable Calculator.HP-92 Printing Business/Financial Calculator.Second Generation Desktop Calculators (1976) HP-27 "Do Everything" Model (Sci/Stat/Math/Bus).Second Generation Handheld Calculators (1975) It is a complete rewrite, not using any HP code. HP-46, 56, 66 and HP-9805 Design Studies. Free42 is a re-implementation of the HP-42S Scientific Programmable Calculator and HP-82240 Printer.HP-55 Scientific/Programmable with Quartz TimerĬlassic Printing Desktop Calculators (1973).HP-35 The First Slide Rule Pocket Calculator.HP 9815A/S Third Generation RPN Desktop.HP 9810A Second Generation RPN Calculator.HP 9100A&B Programmable RPN Calculators with no digital ICs.Calculating Machines, Slide Rules, etc.The HP Garage - The Birthplace of Silicon Valley.There is a story about an HP12C which made it intact and still operable after a pass through the digestive tract of a hippopotamus. Those marks along the left side were from when my dog decided to chew on it. One of the other distinguishing attributes of HP calculators is their durability. The remaining functions are available through "soft keys" which appear on the display just above the top row of keys. The functions I use most often are represented with actual keys. The two line display shows what numbers you are working with. ![]() I don't think I still understand exactly what all of the functions would be used for, but the calculator not only does the complex but also makes the simple things simple. Of course, understanding this or the 600 functions built into the calculator introduced the user to a bewildering array of math concepts. These two features combined enable complex calculations with ease. The 42s among others also added a stack which would hold interim values without having to explicitly store to memory. Most of their calculators were designed for people who were serious about doing calculations and used what is called "Reverse Polish Notation" or RPN to enter and execute calculations. Starting in the early 70's and continuing for about 20 years HP was the quality leader in calculators. It is the Hewlett Packard 42s.īefore they became a printer company, Hewlett Packard used to make some of the best calculators in the world. It used to be said that calculators would create a generation of people who could not do math, and maybe that is correct, but in contrast this calculator really rewards those who understand mathematics.
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