title: Clarification :MVC,MVP,MVVM
body: <p>I am reading the difference between MVC,MVP,MVVM</p>
  
  <p>Source: <a href="http://geekswithblogs.net/dlussier/archive/2009/11/21/136454.aspx" rel="noreferrer">here</a></p>
  
  <p><img src="https://i.stack.imgur.com/nlBh0.png" alt="alt text"></p>
  
  <p>My doubt is ,the diagrams (MVP) (MVVM) show  bidirectional arrow between Modle and Presenter,Model and ViewModel.</p>
  
  <p>Presenter and ViewModel obviously aware of Model.But does it mean  Model is aware of Presenter and ViewModel?</p>