The document discusses the Unified Point of Service (UPOS) standard, which defines an architecture for application interfaces to point-of-sale devices in a retail environment. UPOS aims to provide a standard way to communicate with devices and allow users to change devices without changing application details. Implementations of UPOS include OPOS for Microsoft platforms and JavaPOS, which is operating system independent using Java technology. The Kube printer is compliant with the UPOS standard.