General Purpose Digital Computers are now making their appearance in industrial plants. For the most part, they do not merely mechanize tasks previously handled by humans but make possible an entirely new era in control of complicated processes. Industrial Control Computers are now being designed for such applications. This paper discusses in basic terms the characteristics and performance features of Industrial Computers, and how they can increase process profitability. Computer Speed, Memory Capacity, Kind of Memory, Mechanical Design, Programming Features, Reliability and other specifications are related to requirements of Industrial Control. A typical application analysis is explained through use of a high-speed tin plate line as an illustrative example. Several suggestions are offered as an aid in the writing of better purchase specifications. Currently about three years are needed to go from first conception to an operating Industrial Computer installation. A discussion is given of the many tasks to be completed by user and supplier in this process.