The iPod is a line of portable media players designed and marketed by Apple Inc. The iPod Nano is the smallest model in the iPod family, and was first released in 2005. It features a small touchscreen display and a click wheel for navigation. The iPod TOUCH is the most advanced model in the iPod family, and was first released in 2007. It features a larger touchscreen display and a home button for navigation. Both models are capable of playing music, videos, and other digital content.