Amazon.com : Waveshare Barcode Scanner Module 1D/2D Codes Barcode, QR Code Reader Onboard Micro USB and UART Serial Port Directly Plugged into Computer : Office Products
Barcode Reader/Scanner Module - CCD Camera - PS/2 Interface : ID 1202 : $69.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Arduino barcode scanner - RTscan
How to Interface Barcode Scanner Module with Arduino - Androiderode
Amazon.com : Barcode Scanner Module, 1D/2D Codes Reader Decode Barcode, QR Code etc Onboard Micro USB and UART Interface Plug into a Computer Directly or Other Device Onboard Light Source can Work
Barcode/QR Code Reader using Arduino & QR Scanner Module