On June 29, 2007, the world changed forever. That was the day the first-generation iPhone® was released to the public. There are several reasons that the iPhone had such a huge impact. It redefined what a cell phone could do. It looked sleek, modern, and (mostly) seamless. It had a high-resolution full color display. It included a fully functional music player. It had an eco-system of custom applications. But the most important thing about the iPhone was that it could recognize two separate touches simultaneously. That may not sound like a major accomplishment today, but in 2007 it was revolutionary.