History of iPod timeline.

Period: Jan 1, 2001 to Sep 16, 2015

Ipod
Oct 23, 2001

1st generation ipod classic

First model, with mechanical scroll wheel. 10 GB model released later. Capaciy 5, 10 GB.
Jul 17, 2002

iPod classic 2nd generation

. Using the same body style as the first generation, Touch-sensitive wheel. Hold switch revised.
Apr 28, 2003

3rd generation iPod classic

First complete redesign with all-touch interface, dock connector, and slimmer case. Capacity 10, 15, 20, 30, 40 GB.
Jul 19, 2004

4th generation iPod classic

Adopted Click Wheel from iPod Mini, hold switch redesigned.Capacity 20, 40 GB.
Oct 12, 2005

5th generation iPod classic

Second full redesign with a slimmer case, and larger screen with video playback. Offered in black or white. Hardware and firmware updated with 60 GB model.
Sep 5, 2007

6th generation iPod classic

Introduced the "Classic" suffix. New interface and anodized aluminum front plate. Silver replaces white. In September 2008 the hardware and firmware was updated with a 120 GB model replacing the 80 GB model.

Ipod