The TURING program simulates the operation of a Turing Machine. Turing Machines are abstract models of primitive digital computers. In fact, they are the most fundamental models of all logical computations. Such a machine was conceived by the British mathematician Alan Turing in 1935, long before digital computers became established. Turing also worked on machines to break the secret codes produced by the German Enigma machine in World War II. TURING provides a tape with 999 elements, all of which must be 0 or 1. These are unary digits, NOT BINARY digits. In addition, the state transition table can hold up to 99 states. These two capacities should be more than adequate for the demonstration nature of this program. In addition, TURING has a full-screen editor so that users may write, edit, and save their Turing Machine programs. You can also vary the speed of animation and can run programs in either an automatic mode or a single-step mode. Three sample demonstration programs are included in the files called TDEMO1.TXT, TDEMO2.TXT, and TDEMO3.TXT. There is also an independent tutorial file, TURING.TXT, which is for first-time users. TURING.TXT may be imported into any word processor and/or printed on any printer.