There was a brief period through the 1960s into the 1970s when the last word in electronics was the calculator. New models sold for hundreds of dollars, and owning one made you very special indeed.

The gold standard for graphing calculators, at least in the US, are the Texas Instruments TI-84 series. Some black sheep may have other types, but largely due to standardized testing these ...

Every detail, down to the white lines along the top and bottom of the watch face, projects retro-modern calculator style." It's just $36, too, cheap enough for me not to beg for smartwatch features.