As a calculator nerd, my little beauties are solutions in search of a problem. It's not that I have an external need for calculators - at least not to the level I use them. I love using them and are in constant lookout for new ways of putting them to use.
I used to have an HP-16C. It burned to ashes along with some 90 other calcs. But I never got around to really using this cool little chap. Not until I acquired another recently.
My first and foremost passion is the 41. I love MCODE-ing it and finally figured out a good use for the 16C: To calculate jump codes for the 41 MCODE.
I imagine this must be one of the things I have done in life that has the least audience. Few people program any MCODE and I guess few of those have an HP-16C - and of those two or three left, there just might be one person interested in this program. But what the heck - I did it because I enjoyed it.
In case you care, go here: My HP-41 page.