Interestingly, one finds 'reactive' programming in such old systems. What's old is new again! "From a structural perspective, an ACS may be seen as an instance

Interestingly, one finds 'reactive' programming in such old systems. What's old is new again! "From a structural perspective, an ACS may be seen as an instance of a Model-View-Controller (MVC) design[7]. An ACS maintains a ``reactive'' model of the world that is controlled via updates in response to new data sources"