Have you used your calculator for something that was not really math related?

[4ster]

I am a rebreather diver and the most critical safety aspect of them is the cells used to report oxygen levels in the system. To be redundant most designs use at least 3 cells, my rebreather uses 5. I recently put together a system to test performance and keep track of the age of each cell using a 41CX as a controller/data recorder.