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Background and Identification

The FX-991ES is a scientific calculator from Casio. It has a built-in solar panel and a sliding plastic case to protect the face of the calculator when not in use.

Features

  • Two way power
  • 417 Functions
  • Full Dot Display
  • Plastic Keys
  • Integration / Differential
  • Equation calculation
  • Matrix calculations / Vector calculations
  • Complex number calculation
  • CALC function / SOLVE function
  • Base-n calculation
  • Fraction calculation
  • Combination and Permutation
  • Logarithm log
  • List-based STAT data editor
  • Standard deviation
  • Paired-variable statistics regression analysis
  • Logical operations
  • Table function
  • 40 scientific constants
  • 40 metric conversions (20 conversion pairs)
  • 9 variable memories

Additional Information

Casio: Product Page

Product Manual

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