iTunes' original and main focus was music, with a library offering organization and storage of Mac users' music collections. ITunes was originally announced by Apple CEO Steve Jobs on January 9, 2001. Options for sound optimizations exist, as well as ways to wirelessly share the iTunes library. Developed by Apple Inc., it is used to purchase, play, download, and organize digital multimedia, on personal computers running the macOS and Windows operating systems, and can be used to rip songs from CDs, as well as play content with the use of dynamic, smart playlists. ITunes ( / ˈ aɪ tj uː n z/) is a software program that acts as a media player, media library, mobile device management utility, and the client app for the iTunes Store.