Deployment of Open Source software is booming in retail environments. The combination of reliability, cost and ability to customize makes open source an obvious choice for large retail deployments. This session will be from the perspective of a system administrator building a large retail environment integrating proprietary software by weaving it all together with open source tools. The case study will document where open source applications were chosen and where they lost out to proprietary options. In addition, the session will cover training and knowledge transfer, documentation and deployment.