As soon as I read the assignment for today, I knew what I wanted to take a photo of. This calculator was the first scientific calculator I ever used. It has seen me through undergraduate physics classes, graduate level physics classes, and it still works. I guess it is really like a timex, "It takes a lickin' but keeps on tickin.'" The buttons are incredibly difficult to pusch compared to today's calculators plus it isn't solar powered and it eats batteries like crazy.