(1) See also iPad, Apple's tablet computer.
(2) A family of popular digital media players from Apple. Introduced in 2001, current models comprise the shuffle, nano and touch, the latter a mobile computer like the iPhone (see iPod touch). All current iPods use solid state flash memory for storage. Due to the iPod's prominence, the term often refers to any MP3 player, whether an Apple product or not (see digital music player). However, because iPhones and every other smartphone have music storage and playback built in, iPod sales have diminished considerably over the years. iTunes Is the Media Manager Apple's iTunes software for Mac and Windows, which is also widely used to play music in the computer whether people have iPods or not, is used to organize songs and videos and to preview, purchase and download content from Apple's online store. iTunes lets users rip CDs to the computer as well as burn CDs with content in their music library. It also keeps the iPod's firmware up-to-date and decodes movies and TV shows that Apple sells with copy protection. See iTunes, ripping and FairPlay. Music Files and Formats iPods play MP3 music, but songs downloaded from the iTunes store are in the AAC format. Although touted as having superior sound quality, a major reason for using AAC was its digital rights management (DRM). In 2009, Apple dropped the AAC copy protection. MP3 and AAC formats are roughly 10% the size of the original CD tracks; however, users may opt to rip their CDs to the Apple Lossless format for better sound quality, despite being five times the size of MP3 and AAC files. iPods do not support Microsoft's Windows Media Audio (WMA) format. However, numerous utilities convert WMA to MP3, and the Windows version of iTunes converts WMA to all formats that iTunes and the iPod support. History The combination of sound quality and unique click wheel control made the iPod one of the most successful consumer electronics (CE) products in history. In its first five years, 100 million iPods were sold along with 1.5 billion songs. See click wheel. Originally a monochrome device for music only, color screens and support for photos and videos were added. In 2007, the iPod touch was a full-fledged handheld computer. For details of current and previous iPods, see iPod models, iPod classic, iPod touch, iPod nano and iPod shuffle. Batteries The rechargeable battery in the iPod is sealed and must be sent to Apple for replacement, which is free under warranty. However, non-Apple sources offer replacement batteries and instructions for opening the case. See iCloud, iPod compatible, iPod finger, iPod car adapter, car podding and pod slurping. A/V and Image Formats Except for the shuffle, which has no screen, iPods display major image formats, including JPEG, GIF, BMP, TIFF and PNG. The classic and touch both support MPEG-4 and H.264 video. Following are the iPod's audio formats. iPOD AUDIO FORMATS classic, nano, Formats touch shuffle MP3 X X MP3 VBR X X AAC X X HE-AAC (aacPlus) X Audible X X Audible Enhanced (AAX) X X Apple Lossless X X AIFF X X WAV X X