●●●●● ●●●● Architectural Layers ●●● ●●●● ●●0● UI not the java Swing qp- Swing libraries,but Web our Gul classes based on Swing Domain Sales Payments Taxes Technical Services Persistence Logging Rules EngineArchitectural Layers Domain UI Swing not the Java Swing libraries, but our GUI classes based on Swing Web Sales Payments Taxes Technical Services Persistence Logging RulesEngine