With the widespread adoption of digital QR and barcode payments, virtually all retail boutiques and restaurants depend on digital POS systems. All-in-one POS terminals integrate computing hardware, touchscreens, barcode scanners, and receipt printers

Step into many small restaurants, convenience stores, or bubble tea cafes, and a familiar scene unfolds at the front counter: a bulky desktop PC, a standalone payment POS terminal, three different QR payment acrylic stands, a tablet for delivery orde

Checking out at a modern supermarket takes just seconds: scan a barcode, see the price on screen, process payment, and print the receipt. While the customer-facing interaction appears effortless, a systematic operational workflow is operating behind