A mathematician at Yale in 1934 and in the U.S. military. She created one of the programming languages still used today, known as COBOL.
When the US entered World War II, Grace abandoned her profession as a math teacher and entered the navy, where she became a rear admiral. She was engaged in computing tasks and was the first programmer to use the Mark I. computer, the first large-capacity computer.
After the war she moved to the reserves and remained at Harvard until 1949, when she began working at the Eckert - Mauchly Corporation in Philadelphia, which at the time was developing the BINAC and UNIVAC I. computers. She worked at that company and its successors until her retirement in 1971. It was there that Hopper made her greatest contributions to modern programming. In 1952, she developed the first compiler in history, the A-0, and in 1957 she made the first compiler for data processing using English orders, the B-0 (FLOW-MATIC), used primarily for payroll.
After her experience with FLOW-MATIC, Hopper thought that a programming language could be created that used English commands and served for business applications. With this idea, the foundations for COBOL had been established, and two years later the committee was created that designed this language.
At the end of her professional career she participated in the standardization committees of the COBOL and FORTRAN programming languages.
She returned to the navy several times as an adviser in programming languages and upon her death at 85 she was buried with full military honors.
Sources:
https://es.wikipedia.org/wiki/Grace_Murray_Hopper