Summary
Items, among other products, are the basis of your business; they are the goods or services that you trade in. Each item must be registered as an item card. The Inventory type involves full tracking of inventory quantity and value. Therefore, all item transaction types are supported, and items of type Inventory can be used with all item-handling features.
The Service and Non-Inventory types don't involve tracking of inventory quantity and value. Therefore, only selected item transaction types and features are supported.