Continuous Control:
In continuous control, the usual objective is to maintain the value of an output variable at a desired level. It is similar to the operation of a feedback control system as defined in the previous. However, most continuous processes in the practical world consist of many separate feedback loops, all of which have to be controlled and coordinated to maintain the output variable at the desired value.
Discrete Control:
Discrete control in which the variables and parameters are discrete, mostly binary discrete. It emphasize the assembly of high quality engineered components or sub-assemblies into more valuable final product configurations, or the physical manipulation of discrete entities.