<system> (DCs) A digital computer used for real-time control of a dynamic system, usually in an industrial environment, possibly as part of a {supervisory Control and Data Acquisition} (sCADA) system. A DCssamplesfeedback from the system under control and modifies the control signals in an attempt to achieve some desired behaviour. Analysis of such digital-analogue feedback systems can involve mathematical methodssuch asdifference equations, {Laplace transforms}, {z transfer functions}, {state space models} and state transition matrices. (2004-08-22)