Casio 121-A

The Casio 121-A is an early small and medium-scale IC-based calculator, sacrificing capability for small size, and comparatively low-cost compared to other calculators of its day. The 121-A is also near the beginning of a long line of Casio 121-series calculators.At the time that the 121-A was designed (1969), most desktop calculators were significantly more expensive, and generally not quite as portable as this machine. Even though it is still an AC powered desktop" device, the 121-A is small enough to easily carry around from place to place where calculations are required. To keep the price and physical size of the machine down, some compromises were made in the functionality of the machine.