Casio / Calculator / Black / Standard functions / Fraction calculations / Addition and substitution / Statistics (list-based STAT data editor, standard deviation, regression analysis) / 9 variables Table function / Comes with a new sliding hard case / fx-82ES PLUS / 85ES PLUS / 350ES PLUS functions / Equation calculations / Integration/Differentiation Calculus / Matrix calculations / Vector calculations / Calculations of complex numbers / CALC function / Solution function / Base-n calculation / Fusion / Calculations of complex numbers / Differential / Vector / Matrix operations / to set / Not programmable / Natural book presentation / Show the same expression as the textbook / number / 10 + 2 number / 10 digit mantissa + 2 digit exponential display / Dot matrix display / The high-resolution display delivers good-looking graphics every time / 1 Year Warranty / fx-991ESPLUS.