What is difference between Piping Layout, Plot Plan, P&ID and Piping Isometrics?

(i) Piping Layout is dimensional drawing showing plan of pipelines laying view between starting and end points. This incorporates size of pipe (inches),thickness in inch or schedule or std.,XS-XXS., fitting detail bend,elbow,tees, reducers,valves),elevation of piping points and all details to lay pipe between two points in consideration.
(ii) Plot plan is showing drawing of land detail with ajcent reference points, where project is to take or taken place.This is dimensional drwing
(iii) P.&ID. means Process & Instrumentation diagram , it is showing piping with instrumentation control system.Generally not drawn to scale.
(iV) Piping isometric means isometric view of pipe line between two points in consideration.Drawn to the scale.Gives correct detail of Bill of Matrial needed for execution of the piping job.