It would be great to have an extra module to manage the stock of serial numbers (detailed) for items/products that require Stock Management (Manage Stock checkbox in product). This means that it would be required to register the serial numbers for this items/products when creating new product (opening stock), new purchase, new stock adjustment, new stock transfer. In POS when selling one of this products/items, it should be required to register the serial number being selled. This way, the stock management is really complete and detailed.