On this day in 2007, coinciding all those years ago when Steve Wozniak tested the first prototype of the Apple I computer in 1975, the iPhone made its public debut (previously) in the United States. Retronymically dubbed the iPhone 2G to differentiate from the twelve generations and accompanying operating systems that have followed, Steve Jobs (*1955 – †2011) had been experimenting on the technical and user-experience viability of introducing a fully touch interface two years prior to release under the code name Project Purple 2, as the company worked covertly in collaboration with cellular service providers to ensure that networks could handle the demand.