LCD display calculators from the 1980s and 1990s are not as interesting as the LCD and VFD display machines of the previous decade but i like this simple little Radio Shack machine. It reminds me of the vogue in my latter school days for machines with solar panels, it seemed like we were entering the future with free power! The EC-458 is dual power so has a battery as well, and still works fine.
It has the basic arithmetic functions plus square root and memory. A basic machine, with a solar panel!
