This is a simple barcode reader and displays the decoded data from a barcode.
Most common barcodes are parsed.
After opening the app directly it will parse the scanned barcode and show what kind of code is scanned. When the app is called from a web page it will scan one or more codes and return the results to the given page.
This BarcodeScanner is not a standalone application, but part of the system, which is called from a website, like a WordPress page.
For example see: http://www.dragonet.nl/barcode-scanner/
The scanner can recognize multiple barcodes (not only one), and results are sent back to the web page, where they are processed.