9 Ways to Scan QR Codes from Image, PDFs, or Without Any App - Gadgets To Use
Quick Response (QR) Code: Definition and How QR Codes Work
An explanation by Katie Hutchinson. QR stands for Q uick R esponse code It's a two-dimensional bar code that can be interpreted by a smartphone camera. - ppt download
Barcode Scanner for Android - Download the APK from Uptodown