Ada Lovelace is often considered the world's first computer programmer. She is famous for her work on Charles Babbage's Analytical Engine, where she conceptualized the idea of a machine that could perform any computation, not just numbers.
Konrad Zuse was a German civil engineer, inventor, and computer pioneer. He is credited with designing and building the world's first programmable computer, the Z3, in 1941. Zuse also contributed to the development of the first high-level programming language, Plankalkül.
Alan Turing was an English mathematician, computer scientist, logician, and cryptanalyst. He is best known for his work in breaking the Enigma code during World War II, and for conceptualizing the Turing machine, a foundational model of computation.