Casio 991 MS

Calculator is very important & useful device in our day today life. I used to use Casio 991 MS in my college days. This calculator is very much reliable & its battery life is quite good. The battery of this calculator lasted for about 4-5 yrs. It is much durable one. It has many fonctional options in it & calculate everything efficiently.

Following are the calculators:

1. 2-line display

   
   




2. Fraction calculations

   
   




3. Integration calculations

   
   




4. Combination and Permutation

   
   




5. Statistics

   
   




6. Base-n calculations / conversions

   
   




7. Logical operations

   
   




8. Complex number calculations

   
   




9. CALC memory

   
   




10. Engineering symbol calculations

    
    




11. 40 scientific calculations

    
    




12. 40 metric conversions(20 conversion pairs)

    
    




13. 9 variable memories

    
    




14. Comes with slide-on hard case