CASIO FX-991ES Plus-2

Specifications

Non Programmable
Number of Functions : 417
Natural textbook displayDisplay expression same as textbook.
10 + 2 digits10-digit mantissa + 2-digit exponential display.
Dot matrix displayHigh-resolution screen provides beautiful looking graphs every time.

Multi-replayQuick and easy recall of previously executed formulas for editing and re-execution.
Solar & BatterySolar powered when light is sufficient, battery powered when light is insufficient.
Plastic keysDesigned and engineered for easy operation.
Basic Mathematical FunctionsTrigonometric, Exponential logarithmic, etc.
Table GenerationYou can create a numerical table based on that expression by registering a function expression. In addition, graph functions can be represented by graphs.
Base-n calculationBinary/Octal/Hexadecimal
Scientific ConstantsYou can use constant symbols used in physics, science classes.
Vector
List based STAT-data editorViewing and editing of input data in list format, showing data groups (x-data, y-data, frequency) and surrounding data.
Basic StatisticsStandard statistics functions such as Mean, SUM, Standard Deviation, and Regression
Non Graphing
Differentiation
Matrix
Equation
Integration
Metric conversion functionYou can convert a number in one unit to a number in a different unit.
Complex number calculation