In a recent interview with The Wall Street Journal, Apple senior software engineer Greg Christie offers a detailed look at the development process that culminated in the first iPhone. Christie shared the story of how an ultimatum from late Apple cofounder Steve Jobs pushed the engineer and his team to create what would become the first iPhone.

According to Christie, his team had been working on a “software vision” for the handheld when Jobs gave him two weeks to come up with something before the project was assigned to another group. The engineering team developed