This article talks about Data Processing System, which is a computerized system that performs mathematical operations on input-data to transform it into the output form desired by a system user. It is a system of interrelated techniques and means of collecting and processing the data needed to organize control of some system. Data Processing System can perform not just individual information-processing and computing tasks but a set of tasks that are interconnected and can be carried out in a single sequence of operations. It should be distinguished from automated control systems.