Apple introduced the
second generation iPod in July 2002. Although it looked like the
original iPod, the new model had a touchwheel instead of the
spinning scrollwheel of the original.
The original iPod (right) was introduced in October 2001. It had a 5 GB hard drive and could put "1000 songs in your pocket." The distinguishing characteristics of a 1G iPod are four buttons surrounding the scroll wheel (which actually turns) and a FireWire port on top.