Back around 1989, I had an afternoon off from flying B-52H sorties out of Carswell AFB, so I walked into the Tandy Factory Outlet store near Dallas/Ft. Worth. In amongst the piles of returned items was this little Tandy Pocket Scientific Computer, Model PC-6. It intrigued me, since I had been prolific in BASIC starting with my first TRS-80 CoCo III, so I plunked down the $25.00 for the little pocket PC, and took it around the world with me for the next 15 years. It did yeoman duty figuring aircraft weights and balances, as well as radiation dose rates, etc. Heck, I even programmed it to play Blackjack.
Lately, I've been using it for trigonometry and GD&T calculations. It's seen better days, but I'll wager it would fit nicely into Tam's Digital Fossils collection. I'm just happy that it can still find use, nearly 20 years after it first hit the market.