Looking for a SharePoint 2013 Object Model Diagram or Document

Hi All,

I am new to SharePoint 2013 development and I'm looking for a SharePoint 2013 Object Model Diagram or Document where I can quickly see the right steps to take to get SharePoint information. For example if I wanted to get the List Items I would first need to get SPSite, than SPWeb, than SPList and finally get SPListItems. I've started a list below, but I am hoping to find a definitive list on a website.

      2) SPSite:      
        SPSite >  SPWeb > SPList
        SPSite >  SPWeb > SPList > SPListItems
        SPSite >  SPWeb > SPList > SPFolders

      1) SPFarm:
       SPFarm > SPWebService      
       SPFarm > SPWebService >  SPWebApplication       
       SPFarm > SPWebService >  SPWebApplication >  SPJobDefinition;

I hope you can help
Alan