Testing STCalculator
To test what you have done so far: 
1.	From the File menu, select New to open a new Workspace. 
2.	Type the expression STCalculator new open. 
3.	Execute the expression by selecting it, then selecting Execute from the pop-up menu. A window resembling the following appears: 
Congratulations! You created a window. Now you can close the window before beginning the next step. 
Last modified date: 03/26/2020