Part of stoqdrivers
| Class | ISerialPort | Interface used by drivers to write commands and get reply from devices |
| Class | IDriverConstants | This interface determines the methods to be implemented by all objects |
| Class | IDevice | Undocumented |
| Class | ICouponPrinter | Describes coupon related tasks for a printer. |
| Class | IChequePrinter | Interface specification for cheque printers. |
| Class | IScaleInfo | This interface list the data read by the scale |
| Class | IScale | This interface describes how to interacts with scales. |
| Class | IBarcodeReader | Interface specification describing how to interacts with barcode |
| Class | ISintegraData | Undocumented |