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An original HP 15C from 1982, manufactured in USA. The HP15C was produced between 1982 and 1989. In 2011, HP released a Limited Edition version of the 15C.
Which I used when I was at Secondary school. Entirely mechanical you wound a handle to crank up the results and the harder the sum the more you had to crank!!!!
A photo of a calculator, some Euro notes and a pen
Like much of our work, we have put all these images in the public domain. Feel free to use them but please credit out site as the source if you do: TaxRebate.org.uk
Calculator shown in my photo has the following screen protector applied, which as you can see is almost impossible to notice:
www.amazon.com/Guerrilla-Military-Protector-Graphing-Calc...
I also highly recommend the following soft case, which fits the Prime like a glove, even with the plastic slide cover attached:
The HP Prime is the only graphing calculator with a capacitive touch-screen, allowing pinch to zoom on graphs. Exam approved. Allows RPN operation. Faster operation than any TI calculator, and easier to use than the TI Nspire.
I acquired two HP Primes for my children who are in Jr. High and High school. The Primes were purchased from Walmart in the USA, which as of July 2018 was the lowest priced seller of any I could find. I myself own an HP28S which is purchased for engineering school in 1989, and a 48GX with 128MB FRAM card and Meta Kernel, and the 50g.
Photo shot with natural window light entering a soft-light cube with gradient background, using a Panasonic GH5 with Olympus 12-100mm F4 lens at F11, ISO200.
From the Paul Graney Collection. This is Graney's pocket sized photographic handbook and diary 1939.
The HP-18C calculator has a clamshell design opening like a book. It includes a graphing and a date-time-alarm feature similar to a personal organizer. The calculator was priced at $175.
From the Paul Graney Collection. This is Graney's pocket sized photographic handbook and diary 1939.
Hewlett Packard HP-80 financial calculator. HP's first financial calculator which was produced shortly after the release of the HP-35 scientific calculator. Came in a high quality metal box.
Nachdem das Eis zwischen uns gebrochen war, erkundete Danbo direkt den Tisch und seine Neugier ließ ihn allerhand Fragen.
Besonders interessierte ihn der Taschenrechner und für was die vielen Knöpfe sind.
Ich versuchte ihm alles so einfach wie möglich zu erklären.
After the ice was broken between us, Danbo explored the desk. He was very curious and asked many questions.
Espicially the calculator seemed very interesting. He asked me about ALL buttons on it. What they do and why there are so many..
I tried to explain all to him!
A tax return form from 2011/2012
I am the designer for 401kcalculator.org. I have put all these images in the public domain and welcome anyone to use them however please credit our site as the source if you do:http://401kcalculator.org
From the Paul Graney Collection. This is Graney's pocket sized photographic handbook and diary 1939.
From the Paul Graney Collection. This is Graney's pocket sized photographic handbook and diary 1939.
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