[eitally]

When I was growing up in the early 80s, my engineer father had an HP-35 that he adored. He ultimately added an HP-12c, too, and when I was in middle school I was gifted an HP-32sii. I was the only weirdo using RPN. :) I upgraded to an HP-48g in high school when everyone else was using Ti-82.

I can't really think of any other company or product line I've had such a longstanding relationship with. FWIW, I still have both of my HP calculators and they work great!