Casio FX 991MS is a very efficient scientific calculator to solve all your mathematical and scientific equations in seconds.  The Casio Scientific Calculator FX 991MS can perform up to 401 functions with ease. It features plastic keys that are comforting to use. The key operations of this brilliant aid are stored in buffer and you can make the best of the 9 variable memories offered by this scientific calculator. Casio FX 991MS allows you to carry on matrix calculations, equation calculations and vector calculations, metric conversions, statistics too. A battery operatedcalculator and can revive your smile as it works with solar power too. This calculator has a tough slide-on hard case that withstands rough use and acts as a protective covering for the calculator. It is a 12 digits calculator to solve more complex problems and it features an extra-large high contrast clear display. An additional feature of this calculator is a 2-line display that provides a clear view of the imputed data and the resultant data at the same time. Casio FX 991MS Scientific Calculator offers a multi-replay function that gives you access to review and edit the assigned formula and hence saves effort by allowing speedy rectification. In case, your tasks are more about graphs, Casio FX 991MS is a suitable choice for you as it is equipped with dot matrix facility for viewing and understanding graphs keenly.