• Go to "Inventory Management",
• Go to "Product/Job code management",
• Click on the spy glass next to "Category",
• Click on the "+" sign to create a new category,
• Choose new category "Number" , "Category type" and "Description",
• Choose Sales GL and purchases GL if your GEM-CAR is linked to an accounting software,
• Save.

Your category is now created and products can be added.