The Sci9 Calculator comes with a lot of extra features. It gives you every answer in 3 formats (the number, the name, the exponent), keeps a library of constants, can guess the values of constants and the names of variables as you type them in, has a small list of equations, lets you copy/paste many numbers and equations directly into the calculator, such as e=m*c^2, numbers with comas 10,000,000 and numbers like 6E+11, as well.Requirements: