Look what I found after so many years! My Hewlett Packard HP12C financial calculator!
I purchased this calculator around 1987 if I'm not mistaken. That would make it 30 years old. It takes three LR44 (A76) batteries which I promptly ordered on eBay. It still works!
The calculator works with Reverse Polish Notation, so you don't enter data the same as a "regular" calculator. For instance, for an equation like 5+8= 13, you would enter it this way... 5 ENTER 8 +
Definitely takes some getting used to, but I'm very familiar with it and it seems I haven't lost the ability to work it! And of course, you can calculate things like interest and payments (for real estate, car payments, etc.)
I checked on Amazon and they still sell this calculator, although it is now less expensive than I paid for it in 1987. I believe it cost around $89 back then. Today you can get it on Amazon for only $52.88! But reading the comments, many seem to say that the quality of construction has gone down compared to the older versions.
I'm looking forward to re-learning the calculator and using it again. I even downloaded a free iPhone ap that looks and works just like it! The ap is called Touch Fin (financial calculator). Check it out!
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