"What do Marissa Mayer and Indra Nooyi have in common? They were the first two women to hold US cabinet positions. They are the most recent women to serve as prime ministers. ... They are both now serving as foreign ministers of their countries."
Eli Whitney is credited with putting the concept of using mass-produced interchangeable parts into practice. He came up with this concept during a war, when he used these parts to create guns.
