From Dissent Pins:
 
Ada Lovelace published the first computer program in 1843. She was also the first person to describe a general purpose computer. This pin, part of our Women in Science Collection, celebrates Lovelace's contributions to the field of computer science.
 
This pin is based on a punch card made for the Analytical Engine, the mechanical computer that Lovelace’s program was designed to run on. This pin comes with a fold-out card with Lovelace's story.
 
This pin is 2" wide and has two posts to hold it in place.
 
This pin has small parts and is not made for children!
 
Analytical Engine Punchcard courtesy of Bruce Sterling.