"Cascading combo boxes are used to help aid the user in determining a choice when entering data into a form.
They help to breakdown the options available into selectable sub-groups such a State & City, Product Type & Product, Department & Employees.
The user can select, for example, Customer Services in a combo box and the second combo box's list will reflect this selection and only list those employees within Customer Services.
Switch to Finance and all the Finance employees become selectable, etc."
