Link to video for people in planets.
"She developed the first compiler for a computer programming language. She conceptualized the idea of machine-independent programming languages, which led to the development of COBOL, one of the first modern programming languages. She is credited with popularizing the term "debugging" for fixing computer glitches (inspired by an actual moth removed from the computer)
By the way, for anybody wondering why the COBOL in the Google Doodle for her today:
"SUBTRACT CurrentYear from BirthYear GIVING Age
doesn't return a negative value, it is because age is defined unsigned in the data division. Since ages can't be negative, and COBOL handles this negative return to an unsigned value Gracefully.