Barbara Liskov was the first woman to receive a Ph.D. in computer science, earning her degree from MIT in 1968. Her groundbreaking work includes the development of the Liskov Substitution Principle, foundational to object-oriented programming. Liskov's research has significantly influenced programming languages and software engineering practices, advancing the discipline's theoretical underpinnings. Her contributions not only paved the way for women in technology but also established her as a prominent figure in computer science, inspiring future generations of scientists and engineers.