There’s a fascinating story behind Apple’s “Graphing Calculator” application. Here’s an extract:
In August 1993, the project was canceled. A year of my work evaporated, my contract ended, and I was unemployed… …I was frustrated by all the wasted effort, so I decided to uncancel my small part of the project. I had been paid to do a job, and I wanted to finish it. My electronic badge still opened Apple’s doors, so I just kept showing up… …they asked, “Who do you report to? What group are you in? Why haven’t we seen this earlier?” I explained that I had been sneaking into the building and that the project didn’t exist. They laughed, until they realized I was serious.
Go read it. It’s a great story.