Event-Driven Systems
-  Control decisions depend on external events 
-  Events can be broadcast to all listeners (e.g. power down) 
-  Events can be polled from a source (e.g. GetMessage) 
-  Handlers can be registered to respond 
-  Examples
	
	-  Hardware interrupts 
-  GUI systems 
-  Relational database triggers 
-  System and network management