...
Scanning a barcode on "paper" document helps easily locate the corresponding "electronic" document in the system. Also, scanning barcodes allows you to group paper documents by type and order them by internal number at your workplace.For example, if you have a printed Invoice with barcode, open the list of Invoices in your system, scan the barcode, and an electronic version of the Invoice immediately opens in the system.
For adding scanners as peripherals to the application, refer to Adding a barcode scanner.
...