In the bottom of a large cardboard box, buried under old financial records (whereof a page or two may be important someday):
More stuff from the Isomouse prototype project, including some silicone-sponge pads and PTFE sheets, meant to be used in gluing strain gauges to surfaces. I'd occasionally wondered what had become of those. Also, some strain gauges, and some prototype bendy beams whereto said gauges might be affixed.
And, way in the bottom, a printout that looks like it was done on a Teletype model 33. Maybe it was. The paper doesn't feel right; it feels like that weird thermal paper used in early dot-matrix printers, but the characters are fully formed. Hm. Maybe I used roll-feed paper in my old Selectric printer, and thermal paper was what I had available?
Yup. That's a listing of the firmware for the first piece of automated test equipment I ever built... with a 6502, on a shoestring budget, using scrounged parts wherever possible. Was for testing MEMS pressure transducer dice, back before MEMS was even a thing.