Non-Programmable Scientific Calculator with 401 Functions with 2-line Display
S-V.P.A.M. (Super Visually Perfect Algebraic Method): All the features of the existing V.P.A.M. series plus a new 2-line display and a useful Replay function. All this helps to make mathematics easier to use and easier to understand than ever before
Multi-replay: Quick and easy recall of previously executed formulas for editing and re-execution
Casio fx-991MS is non-programmable scientific calculator with 401 functions. It is a two line display calculator. This calculator can solve Trigonometrical, Statistical, Differentiation, Integral, Regression, Matrix, Vector and many other problems.