User (Browser)
          Task I - talk to the User (screens/messages/etc)
             SaaS <- the vendor provides the screens/message/etc 
             I just use the App
        
        
          Task II - Business Logic    
            PaaS I get the lower level (Database/Security/etc)
            and I need to code the upper level (User screens/messages/etc)
        
        
          Task III - Access storage/services/etc
          IaaS means I create every level, I get a "server" from the cloud provide
          and I install the software myself
        Data in storage