Raspberry PI could be the Touch screen POS.
We (YoungPOS) just completed the Touch screen POS (Point of Sales) with Raspberry PI. We call it Raspberry POS and it could connect to Receipt Printer, Kitchen Printer, Barcode Scanner and Magnetic Stripe Reader (MSR). It is really full POS system for Restaurant and Retails. We could share this project to everybody who interested in POS solutions. You could visit us at www.facebook.com/raspberrypipos to see these pictures/videos or you could share some information.
Step 1: Full Diagram System for Restaurant
Connect to Receipt Printer, Kitchen Printer, Barcode scanner, MSR, Cash Drawer
Step 2: Connect to Printer Via RJ45 Jack
Connect printer directly to switch network device
Step 3: Connect to Touch Screen Monitor, Printer
Connect these POS peripherals device (Touch Screen Monitor and Printer)
Step 4: Starting
Now we plug power and it is running
Step 5: Touch Screen Testing With Debian OS
First UI for Raspberry PI
Step 6: Touch With Our POS Software
Touch with monitor 17"
Step 7: Print Receipt Out Within 2 Printers (receipt Printer and Kitchen Printer)
Printer print a receipt out.. The receipt printer is left and the kitchen printer is right. They connect to the switch network device
Step 8: Connect to Scanner, MSR Via USB Hub
Connect to USB hub. We could to connect Barcode scanner and MSR device (USB port). Full POS system