The cache is not at the listed coordinates.
The two geocaches of the "Prisoner of the '70s" mini series are dedicated to the history of the Unix operating system.
We saved the coordinates in our pet PDP-11 mini computer. For a 40 years old machine, it is still quite operational. Ready to try it out?
https://pdp11.ciovil.li
About the difficulty
Computer programming, to some extent, is required. We arranged things so that many solutions are possible, each involving different skill sets. So don't be dissuaded if you don't have experience, say, with C, or with Unix itself. In fact, we would rate the difficulty as follows:
| Programmers (any language): |
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| Non-programmers: |
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Edit 13-11-2023. The cache has been moved from its original location. The coordinates found solving the puzzle need to be modified with the following correction: N +0.004 E +0.000. The solution checker can be used to verify the coordinates of the current final location. Size changed from Small to Micro.