![]() Wider Is Better: The HP-12C is in its glory when you rotate it to its full-power landscape mode orientation. When used in portrait mode, you can use the number keys, along with all the usual math operators and a couple of other functions such as square roots and memory-perfect for those times when you just need a basic calculator. The iPhone version is actually a bit better than just a clone of the original, though, because HP includes a simplified portrait-mode calculator (the 12C is a landscape-mode device). It not only looks the same, but it actually runs the same code as do the physical calculators. The iPhone version of the HP-12C is a near carbon copy of the actual machine. If you’ve not used this method of data entry before, you’ll have a bit of learning to do.) Reverse Polish Notation, or RPN, for data entry. (Keep in mind, too, that these HP calculators use If you’re looking for a general use calculator, Note that the HP-12C (and other HP calculators) appeal to a fairly narrow range of users-financial professionals (12C and 12C Platinum) and programmers and scientists (15C). (I still have the original Owner’s Handbook and Problem-Solving Guide, too-all 246 pages of it!) Suffice it to say, I know this calculator inside and out, though it doesn’t get as much use now as it did in my prior life. Though I’ve long since lost the receipt, my HP-12C is approaching its 25th anniversary, and it still runs just as well today as it did when brand new. What’s most amazing about this is that I’m not talking about a progression of different HP-12Cs I’m talking about one HP-12C that is probably older than a fair percentage of the people reading this article. From tests during undergraduate school up through my career change in 2005 to full-time Macworld employee, my HP-12C was with me every step of the way. Through it all, one particular piece of gear was always at my side, ready and willing to help with the trickiest of financial calculations: my Hewlett-Packard For questions about me and the origin of the museum, please see my personal page.Back in my previous life, I was a finance guy-that’s what my undergraduate degree is in, and that’s how I made my living for many years. 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) 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.
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