POS products can be grouped within three different levels: product classes are the middle level. Product classes can be grouped into departments; product classes can also contain product sub-classes.
Go to Administration > POS Settings > Product Classes.
Choose one of the following:
To create a new product class, click Add New.
To modify an existing product class, click the Description of the product class that you want to modify.
Select the POS Department that you want to assign the product class to.
Enter a brief Description for the product class.
To have POS products within this product class qualify for sales commission, select Qualifies for Commission?
Click Save.
Adding or modifying a POS product
Adding or modifying a POS product department
Adding or modifying a POS product sub-class