Don't know why you are getting downvoted, MVC is the combination of the observer and strategy patterns, no more, no less. All the pieces have a single responsi

Don't know why you are getting downvoted, MVC is the combination of the observer and strategy patterns, no more, no less. All the pieces have a single responsibility, the view reacts to model changes and redraw itself, the controller executes the business logic on UI events and the model to broadcast events when its state has/was changed by the controller. Data flows only in one direction.