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Summary
DescriptionHewlett-Packard HP-42S, programmable calculator with RPN (combined from two images, cropped).jpg
English: Programmable RPN calculator HP-42S (built from 1988 to 1995). It shows the values of the X and Y registers of its internal 4-level-stack.
This image is a kind of combination of three source images while combining the good features of each. I have once written a quite extensive "Tutorial about how to retouche/rework images of pocket calculators in GIMP" (well, works of course for many other motives, as well) on my German user page - only in German, but maybe Google Translate is your friend here, if interested.
This is a retouched picture, which means that it has been digitally altered from its original version. Modifications: Combined original images with each other plus display values mixed from all three, strongly adapted colours, removed shiny areas, removed all stains. The original can be viewed here: Charade -131 answer (414991827).jpg: . Modifications made by Pittigrilli.
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
https://creativecommons.org/licenses/by/2.0CC BY 2.0 Creative Commons Attribution 2.0 truetrue
Captions
Hewlett-Packard HP-42S, programmable RPN pocket calculator (1988-1995), showing values of X and Y registers of its stack
Hewlett-Packard HP-42S, programmierbarer RPN-Taschenrechner (1988-1995), mit den Werten des X- und Y-Registers des internen Stacks