Data processing system

The activity of data processing can be viewed as a system. According to james o’brien a system can be defined as a group of interrelated components that seeks the attainment of a common goal by accepting input and producing outputs in an organised process” for example a production system accept raw material  as input and produce finished goods as output.

                         INPUT ----------------------------PROCESSING--------------------------OUTPUT

There are many kinds of data processing system. a manual data processing system is one that utilizse tool like pen, and filing cabinets. a mechanical data processing system uses devices such as typewriter calculating machines and book keeping machines