I. Case Study: The NextGen POS System (Larman, Ch 3)
 A. NextGen POS (3.1)
 B. Architectural Layers and emphasis (3.2)
------------------------------------------
      ARCHITECTURAL LAYERS (TYPICAL)

User interface  -- graphics, windows

   [ DialogBox ]

   =====================

Application logic -- domain objects

   [ Sale ]  [ Payment ]

   =====================

Technical services -- logging, persistence

   [ Log ]    [ PersistenceFacade ]

------------------------------------------