3. Apple iPhone

It seems 1983 was a busy year for Apple. Not only was the company toying with the idea of a portable tablet computer, it was also looking into building its own touchscreen telephone. Created by designer Hartmut Esslinger, who designed the Apple IIc, it lacks the portability of a mobile phone, but shows that Apple were looking to take the initiative in touchscreen technology long before the iPhone was even a glimmer in Steve Jobs's imagination.