The iPod on the left is the iPod Mini, it holds 2gb of music
The iPod on the right is a iPod Nano holding 8gb of music.
The 2 different 'music players' are years apart, the apple corporation first released the iPod on October 23, 2001.
Presently we are now on the 5th generation of iPod.
The first generation - Mp3 player with mechanical scroll wheel and four buttons.
The second generation - It has touch-sensitive wheel, 10 GB and 20 GB hard drives.
The third generation - It has touch-sensitive bottoms and USB connectivity.
The fourth generation - It has click-wheel and only two hard disk version, 20 GB and 40 GB.
The fifth generation - Mp4 player with 60 GB memory storage and video capability.
it goes on...
