ABSTRACT
Command window ◾ (in the center; in older versions, the command window is on the right)—In the command window you can enter commands and data, make calculations, and print results. You can write a program (or script) in the command window and execute the program. However, it will not be saved. Thus, if an error is made, the entire program needs to be retyped. By clicking the up (↑) arrow key on your keyboard the previous command can be reentered. Command history window ◾ (bottom right)—This window lists commands that the user has used in the command window.
