A Turing Machine is a theoretical model of computation that was proposed by the mathematician and computer scientist Alan Turing in the 1930s. It is a simple yet powerful abstract machine that can compute anything that is computable. A Turing Machine consists of a tape divided into cells, a read/write head that can read and write symbols on the tape, and a control unit that determines the machine's behavior based on its current state and the symbol under the read/write head. The control unit has a finite number of states and a finite set of rules that determine its transitions from one state to another. The operation of a Turing Machine is as follows: The machine starts in an initial state, and the read/write head reads a symbol from the tape. Based on the current state and the symbol read, the control unit determines the next state and the symbol to be written on the tape. The read/write head then moves one cell to the left or right, and the process is repeated. The machine can continue this process indefinitely, until it reaches a halt state, at which point it stops. The Turing Machine is a theoretical model and has never been implemented in its pure form. However, it is the basis for the modern digital computer and is used to study the theoretical limits of computation. The Church-Turing thesis states that any algorithm that can be computed by any means can also be computed by a Turing Machine.