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

[MattiMark]

I used my 48SX to compute the optimal speed from the final thermal (upwind) when taking the last leg home. This was as you may imagine in the early '90-ies when flying the club gliders did not all have a flight computer.
This approach also made it possible to have several types of gliders preprogrammed into the HP. I must admit that the program, when using user-rpl, was slow... But it worked.

The 15C/LE would have been nice those days.

Regards,
Matti Sweden