The Complete Guide to Liquor Store POS System Benefits in 2026 If you are still running your liquor store on an outdated POS or a system that was not designed with your specific type of retail in mind, you are likely leaving money on the table every single day. Not in obvious ways — the register still rings, the lights are still on — but in small, consistent losses: products that go out of stock before you notice, processing fees you have never...