This paper examines the problem of building a machine which adjusts itself automatically to control an arbitrary dynamic process. The design of a small computer which acts as such a machine is presented in detail. A complete set of equations describing the machine is derived and listed; engineering features of the computer are discussed briefly. This machine represents a new concept in the development of automatic control systems. It should find widespread application in the automation of complex systems such as aircraft or chemical processes, where present methods would be too expensive or time-consuming to apply.