In a refinery, the most time-consuming and arduous activity is the movement of feeds and products within and out of a refinery. It is estimated that there are 200 movements per day coming from hundreds of pumps, switches, and valves. Nevertheless, many modern refineries have automated these operations via complex software. This topic will discuss the extent of OM&S activities in a refinery, the status of OM&S automation, the effect of refiner capacity on no. of movements, typical OM&S activities, problem areas of in-plant oil movement, computer automation of OM&S, OM&S modules, dynamic path selection, object-oriented oil movement display, monitor OM&S tasks, integrated OM&S control system, OM&S system architecture, the benefits of OM&S systems, etc.