Hardware or software that plays audio files encoded in MP3 and other audio formats. On the software side, applications that reside in the user's computer, such as iTunes, Windows Media Player and RealPlayer, are used to organize a music collection, play audio files and rip music from a CD. Software players may also provide access to Internet radio stations and other streaming audio sites (see media player). Hardware Players On the hardware side, devices use solid state flash memory to hold songs downloaded from an online store or the user's computer. Apple's iPod has long been the industry leader, but players have come in all sizes, with some units including FM radio. See iPod. More than MP3 All players, whether hardware or software, support MP3 and generally several other formats. AAC is Apple's featured format, and FLAC provides CD quality sound. See codec examples, MP3, AAC, FLAC, Pono and high-resolution audio. Built into Smartphones and Tablets A music player app is built into all smartphones and tablets, as well as many satellite radio receivers and in-dash navigation systems.