The ENIAC (Electronic Numerical Integrator and Computer), one of the first general-purpose electronic digital computers, was officially retired on October 2nd, 1955, after nearly a decade of service since its completion in 1945. By then, its creators, John Mauchly and J. Presper Eckert, had left to start their own company, and the women who programmed it had moved on to other projects. Nevertheless, ENIAC paved the way for modern computing, leaving an enduring legacy in the field.
You can learn about the history of ENIAC and the women who programmed it at https://breaking20.eu/posts/refrigerator-ladies/ in English or https://breaking20.eu/posts/refrigerator-girls/ in Greek. You can also listen about the adventures of John Mauchly and J. Presper Eckert after leaving the ENIAC project to start their own company at https://breaking20.eu/posts/univac/.