Some awesome stuff she did: Grace Hopper developed first compiler, allowing computer calculations to move beyond simple arithmetic and into more complex problems. She also developed first standardized computer language, COBOL, which laid the groundwork for all the languages we use today.
One day she found a dead moth disrupting one of the electronic relays in the Mark 1 computer, and upon removing it (and fixing the computer), the term “debugging" was born. Awesome! And beyond that, she was a charming scientific communicator, and possessed a marvelous ability to make people, and remember this was in a time when almost no one owned their own computer, truly appreciate both the importance and the complexity of computing technology.