Features of Casio Scientific Calculator (FX-991MS):

1. 2-line display
2. Fraction calculations
3. Integration calculations
4. Combination and Permutation
5. Statistics
6. STAT-data editor, Standard deviation, Normal distribution calculations, Regression analysis)
7. Base-n calculations / conversions
8. Logical operations
9. Complex number calculations
10. CALC memory
11. Engineering symbol calculations
12. 40 scientific calculations
13. 40 metric conversions(20 conversion pairs)
14. 9 variable memories
15. Comes with slide-on hard case