Casio Scientific Calculators FX-991ES PLUS Large 2-line display:
The large display makes it easy to read your calculations, even for complex ones.
417 functions: The FX-991ES PLUS has a wide range of functions to meet your needs, from basic arithmetic to trigonometric functions.
10 variable memories: Store your results for later use with the nine variable memories.
Comfortable keyboard: The comfortable keyboard makes it easy to type in your calculations.