The iPod is a line of portable media players created by Apple Inc. The iPod Type includes three models: the CLASSIC, the Nano, and the MINI. The CLASSIC model was released in 2001 and has a 7-letter name. It was the first iPod to feature a color display and a click wheel. The Nano model was released in 2005 and has a 4-letter name. It was the first iPod to feature a multi-touch screen and a clip-on design. The MINI model was released in 2004 and also has a 4-letter name. It was the smallest iPod ever made and featured a scroll wheel.