Was one of the first programmers of the Harvard Mark 1 computer. She developed the first complier for a computer programming language. Grace also conceptualized the idea of machine independent programming languages. She was credited with popularizing the term “debugging” for fixing computer glitches.
Led development of the original IMB PC
Developed the mathematical theory of packet networks, the technology underpinning the Internet, while a graduate student at MIT in the period from 1960-1962
won the John von Neumann Medal for "fundamental contributions to programming languages, programming methodology, and distributed systems".