Numero is a calculator program that I made because I don't like the calculator that comes with Windows. Microsoft's calculator program only lets you type in one number at a time. Mine, however, can do the order of operations, so you can type in the whole expression at once. Numero has about everything that you would expect to see on a scientific calculator, including trigonometric and arctrigonometric functions. In addition to the text box that you enter the expression into, Numero has a text box that displays all of the expressions and answers that you have already calculated. I also added fading in and fading out effects when you open and close the program, and there are some options that let you customize the interface. You can change the colors of the window, and you can change how transparent it is.