iTunes is a propietary digital media player application, introduced by Apple Inc. on January 9, 2001.
The application is used for playing and organizing digital music and video files. The program is also an interface to manage the contents on Apple's popular iPod digital media players as well as the iPhone.
Additionally, iTunes can connect to the iTunes store via the Internet to purchase and download music, music videos, television shows, applications, iPod games, audiobooks, etc.
Users can organize their music into playlists within one or more libraries, edit file information, record compact discs, copy files to a digital audio player, purchase music and videos through its built-in music store, download free podcasts, back up songs onto a CD or DVD, run a visualizer to display graphical effects in time to the music, and encode music into a number of different audio formats.