"Grace Hopper and UNIVAC" by Unknown (Smithsonian Institution) -
Flickr: Grace Hopper and UNIVAC. Licensed under CC BY 2.0 via Wikimedia Commons -
In 1954 Grace Hopper was the only person in the world able to program the complier (software) for the UNIVAC computer in time for the Navy.
Grace Murray Hopper was born December 9, 1906 and died January 1, 1992. She was an American computer scientist (one of the first in the world) and United States Navy rear admiral. She was one of the first programmers of the Harvard Mark I computer in 1944.
She invented the first compiler for a computer programming She is credited with popularizing the term “debugging" for fixing computer glitches (inspired by an actual moth removed from the computer).
Here's a picture of her notebook page showing the first computer bug.