Alan Turing, a British mathematician and logician, submitted his landmark paper 'On Computable Numbers' to the Proceedings of the London Mathematical Society in May 1936. This submission marked a critical moment in the field of mathematics and laid the groundwork for what is now known as theoretical computer science. Turing's work concentrated on the concept of computation and introduced the idea of the Turing machine, an abstract device that could simulate any algorithmic process. Through this model, Turing explored the limits of computation and articulated what it means for a function to be computable. His paper resolved notable questions related to the Entscheidungsproblem (decision problem) posed by mathematician David Hilbert, effectively showing that not all mathematical problems can be solved algorithmically.Turing used the Turing machine concept to demonstrate that certain functions cannot be calculated by any algorithm, hence establishing the foundation for understanding problems related to decidability in mathematics. His work also made significant contributions to binary code and laid the groundwork for the development of modern computing machines. Turing’s ideas revolutionized the field, influencing subsequent thinkers like John von Neumann and contributing to the evolution of computer programming and machine design. In articulating the theoretical underpinnings of computation, Turing helped to establish the discipline that would evolve into computer science as we know it today.