Stack ADT Stack ADT.Top inout Stack ADT.Bottom inout Stack Artist Stack Artist.Top inout Stack Artist.Bottom inout Stack Pie Artist Stack Pie Artist.Top inout Stack Pie Artist.Bottom inout Graphics Binding Graphics Binding.Top inout Graphics Binding.Bottom inout Bus Connector Bus Connector.Top inout BusConnector.Bottom inout Bus Connector BusConnector.Top inout BusConnector.Bottom inout Stack ADT-Bus Connector Bus Connector-Stack Artist Bus Connector-Stack Pie Artist Stack Artist-Bus Connector Stack Pie Artist-Bus Connector Bus Connector-Graphics Binding