Ada Lovelace day, and more
Ada Lovelace is considered to be the first programmer, for her work on Charles Babbage's Analytical Engine. She's credited with creating the first algorithm intended to be processed by machine.
The Apollo moon landing program was a success, in great part, due to the work of Margaret Hamilton. Margaret, as the lead Apollo flight software designer, lead the team responsible for developing the in-flight software for the Apollo and Skylab programs. Margaret was also one of the key advocate of the term "software engineering", giving it the same legitimacy as other engineering disciplines.
Write some code today!
Photograph of Margaret Hamilton taken by photographer Daphne Weld Nichols, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=12205173
Original watercolor portrait of Ada lovelace.jpg by Alfred Edward Chalon Woodcut-style graphic, Fred the Oyster Colorization: Kaldari (Own work) [CC0], via Wikimedia Commons