IPod
The iPod is a line of portable media players and multi-purpose pocket computers designed and marketed by Apple Inc. The first version was released on October 23, 2001, about  months after the Macintosh version of iTunes was released. As of May 28, 2019, only the iPod Touch (7th generation) remains in production.

Like other digital music players, some versions of the iPod can serve as external data storage devices. Prior to macOS 10.15 Apple's iTunes software (and other alternative software) can be used to transfer music, photos, videos, games, contact information, e-mail settings, Web bookmarks, and calendars, to the devices supporting these features from computers using certain versions of Apple macOS and Microsoft Windows operating systems.

Before the release of iOS 5, the iPod branding was used for the media player included with the iPhone and iPad, a combination of the Music and Videos apps on the iPod Touch. As of iOS 5, separate apps named "Music" and "Videos" are standardized across all iOS-powered products. While the iPhone and iPad have essentially the same media player capabilities as the iPod line, they are generally treated as separate products. During the middle of 2010, iPhone sales overtook those of the iPod.

History

thumb|Discontinued iPod models. From right to left: iPod Shuffle, iPod Nano, iPod Mini, iPod Classic, iPod Classic.

Apple made the Apple Newton from 1993 to 1998 and made the eMate from 1997 to 1998. Following the lackluster sales of these devices, Apple wanted a mobile device and so started to develop a personal media player, which would become the iPod.

The iPod was released in late 2001. The iPod line came from Apple's "digital hub" category, when the company began creating software for the growing market of personal digital devices. Digital cameras, camcorders, and organizers had well-established mainstream markets, but the company found existing digital music players "big and clunky or small and useless" with user interfaces that were "unbelievably awful,"Kahney, Leander.Straight Dope on the iPod's Birth, Wired News, October 17, 2006. Retrieved on October 30, 2006. so Apple decided to develop its own. As ordered by CEO Steve Jobs, Apple's hardware engineering chief Jon Rubinstein assembled a team of engineers to design the iPod line, including hardware engineers Tony Fadell and Michael Dhuey, and design engineer Sir Jonathan Ive. Rubinstein had already discovered the Toshiba hard disk drive while meeting with an Apple supplier in Japan, and purchased the rights to it for Apple, and had also already worked out how the screen, battery, and other key elements would work.Steve Jobs by Walter Issac page 865 The aesthetic was inspired by the 1958 Braun T3 transistor radio designed by Dieter Rams, while the wheel-based user interface was prompted by Bang & Olufsen's BeoCom 6000 telephone. The product ("the Walkman of the twenty-first century" Simon, William L.; Young, Jeffrey S. (2005). iCon: Steve Jobs, The Greatest Second Act in the History of Business. John Wiley & Sons. ) was developed in less than one year and unveiled on October 23, 2001. Jobs announced it as a Mac-compatible product with a 5 GB hard drive that put "1,000 songs in your pocket."

Apple did not develop the iPod software entirely in-house, instead of using PortalPlayer's reference platform based on two ARM cores. The platform had rudimentary software running on a commercial microkernel embedded operating system. PortalPlayer had previously been working on an IBM-branded MP3 player with Bluetooth headphones. Apple contracted another company, Pixo, to help design and implement the user interface under the direct supervision of Steve Jobs. As development progressed, Apple continued to refine the software's look and feel. Starting with the iPod Mini, the Chicago font was replaced with Espy Sans. Later iPods switched fonts again to Podium Sans—a font similar to Apple's corporate font, Myriad. Color display iPods then adopted some Mac OS X themes like Aqua progress bars, and brushed metal meant to evoke a combination lock. In 2007, Apple modified the iPod interface again with the introduction of the sixth-generation iPod Classic and third-generation iPod Nano by changing the font to Helvetica and, in most cases, splitting the screen in half by displaying the menus on the left and album artwork, photos, or videos on the right (whichever was appropriate for the selected item).

In 2006 Apple presented a special edition for iPod 5G of Irish rock band U2. Like its predecessor, this iPod has engraved the signatures of the four members of the band on its back, but this one was the first time the company changed the color of the metal (not silver but black). This iPod was only available with 30GB of storage capacity. The special edition entitled purchasers to an exclusive video with 33 minutes of interviews and performance by U2, downloadable from the iTunes Store.

In September 2007, during a lawsuit with patent holding company Burst.com, Apple drew attention to a patent for a similar device that was developed in 1979. Kane Kramer applied for a UK patent for his design of a "plastic music box" in 1981, which he called the IXI.Boffey, Daniel Apple admit Briton DID invent iPod, but he's still not getting any money Daily Mail, September 8, 2008. Retrieved on September 8, 2008. He was unable to secure funding to renew the US$120,000 worldwide patent, so it lapsed and Kramer never profited from his idea.

The name iPod was proposed by Vinnie Chieco, a freelance copywriter, who (with others) was called by Apple to figure out how to introduce the new player to the public. After Chieco saw a prototype, he thought of the movie 2001: A Space Odyssey and the phrase "Open the pod bay doors, Hal",“Open the pod bay doors, HAL.” - Thisdayinquotes.com, April 2, 2017. which refers to the white EVA Pods of the Discovery One spaceship. Chieco saw an analogy to the relationship between the spaceship and the smaller independent pods in the relationship between a personal computer and the music player. Apple researched the trademark and found that it was already in use. Joseph N. Grasso of New Jersey had originally listed an "iPod" trademark with the U.S. Patent and Trademark Office (USPTO) in July 2000 for Internet kiosks. The first iPod kiosks had been demonstrated to the public in New Jersey in March 1998, and commercial use began in January 2000 but had apparently been discontinued by 2001. The trademark was registered by the USPTO in November 2003, and Grasso assigned it to Apple Computer, Inc. in 2005.Serial No. 78018061, Registration No. 2781793, records of the U.S. Patent and Trademark Office. InPub, LLC, filed an "IPOD" trademark on June 1, 1999, for "computer software and hardware." The trademark was abandoned May 18, 2000, without commercial use.

The earliest recorded use in commerce of an "iPod" trademark was in 1991 by Chrysalis Corp. of Sturgis, Michigan, styled "iPOD", for office furniture.

In mid-2015, several new color schemes for all of the current iPod models were spotted in the latest version of iTunes, 12.2. Belgian website Belgium iPhone originally found the images when plugging in an iPod for the first time, and subsequent leaked photos were found by Pierre Dandumont.

On July 27, 2017, Apple removed the iPod Nano and Shuffle from its stores, marking the end of Apple producing standalone music players. Currently, the iPod Touch is the only iPod produced by Apple.

Hardware
+Chipsets and ElectronicsChipset or ElectronicProduct(s)Component(s)Microcontroller iPod Classic 1st to 3rd generationsTwo ARM 7TDMI-derived CPUs running at 90 MHziPod Classic 4th and 5th generations, iPod Mini, iPod Nano 1st generationVariable-speed ARM 7TDMI CPUs, running at a peak of 80 MHz to save battery lifeiPod Classic 6th generation, iPod Nano 2nd generation onwards, iPod Shuffle 2nd generation onwardsSamsung System-on-a-chip, based around an ARM processor.Cassell, Jonathan. Apple Delivers More For Less With New iPod Nano, iSuppli Corporation, September 20, 2006. Retrieved on October 21, 2006.iPod Shuffle 1st generationSigmaTel D-Major STMP3550 chip running at 75 MHz that handles both the music decoding and the audio circuitry.Williams, Martyn. How Much Should an IPod Shuffle Cost?, PC World, February 24, 2005. Retrieved on August 14, 2006.iPod Touch 1st and 2nd generation ARM 1176JZ(F)-S at 412 MHz for 1st gen, 533 MHz for 2nd gen. iPod Touch 3rd and 4th generation ARM Cortex A8 at 600 MHz for 3rd gen, 800 MHz for 4th gen. (Apple A4) iPod Touch 5th generation ARM Cortex A9 at 800 MHz (Apple A5)iPod Touch 6th generation Apple ARMv8-A "Typhoon" at 1.1 GHz (Apple A8) with Apple M8 Motion coprocessorAudio ChipiPod Classic 1st to 5th generation, iPod Touch 1st generation, iPod Nano 1st to 3rd generation, iPod MiniMacworld Wolfson loses Apple iPod businessAudio Codecs developed by Wolfson MicroelectronicsiPod Classic 6th generation, iPod Touch 2nd generation onwards, iPod Shuffle, iPod Nano 4th generation onwardsCirrus Logic Audio Codec ChipStorage MediumiPod Classic45.7 mm (1.8 in) hard drives (ATA-6, 4200 rpm with ZIF connectors) made by ToshibaiPod Mini25.4 mm (1 in) Microdrive by Hitachi and SeagateiPod NanoFlash Memory from Samsung, Toshiba, and othersiPod Shuffle and TouchFlash MemoryBatteriesiPod Classic 1st and 2nd generationInternal Recyclable Lithium Polymer BatteriesiPod Classic 3rd generation onwards, iPod Mini, iPod Nano, iPod Touch, iPod ShuffleInternal Recyclable Lithium-Ion BatteriesDisplayiPod Nano 7th generation2.5-inch (diagonal) Multi-Touch, 432-by-240 resolution at 202 pixels per inchiPod Classic 5th and 6th generation2.5-inch (diagonal) color LCD with LED backlight, 320-by-240 resolution at 163 pixels per inchiPod Touch 5th and 6th generation4-inch (diagonal) widescreen Multi-Touch, 1136-by-640 resolution at 326 pixels per inch

Audio
The third-generation iPod had a weak bass response, as shown in audio tests.Machrone, Bill. iPod audio measurements , PC Magazine, 2005. Retrieved on February 17, 2007.Heijligers, Marc. iPod audio measurements. Retrieved on February 17, 2007. The combination of the undersized DC-blocking capacitors and the typical low impedance of most consumer headphones form a high-pass filter, which attenuates the low-frequency bass output. Similar capacitors were used in the fourth-generation iPods.Heijligers, Marc. iPod circuit design engineering , May 2006. Retrieved on February 17, 2007. The problem is reduced when using high-impedance headphones and is completely masked when driving high-impedance (line level) loads, such as an external headphone amplifier. The first-generation iPod Shuffle uses a dual-transistor output stage, rather than a single capacitor-coupled output, and does not exhibit reduced bass response for any load.

For all iPods released in 2006 and earlier, some equalizer (EQ) sound settings would distort the bass sound far too easily, even on undemanding songs.Vaughan, Austin. , DAP review, November 8, 2004. Retrieved on September 14, 2012.Handby, Simon. , Expert Reviews, December 19, 2005. Retrieved on September 14, 2012. This would happen for EQ settings like R&B, Rock, Acoustic, and Bass Booster, because the equalizer amplified the digital audio level beyond the software's limit, causing distortion (clipping) on bass instruments.

From the fifth-generation iPod on, Apple introduced a user-configurable volume limit in response to concerns about hearing loss.Cohen, Peter. iPod update limits iPod volume setting, Macworld, 2006. Retrieved on November 7, 2008. Users report that in the sixth-generation iPod, the maximum volume output level is limited to 100 dB in EU markets. Apple previously had to remove iPods from shelves in France for exceeding this legal limit.Fried, Ian. Apple pulls iPod in France. Retrieved on November 7, 2008. However, users who have bought a new sixth-generation iPod in late 2013 have reported a new option that allowed them to disable the EU volume limit. It has been said that these new iPods came with an updated software that allowed this change. Older sixth-generation iPods, however, are unable to update to this software version.

Connectivity

thumb|right|Four iPod wall chargers for North America, all made by Apple. These have FireWire (left) and USB (right three) connectors, which allow iPods to charge without a computer. The units have been miniaturized over time.

Originally, a FireWire connection to the host computer was used to update songs or recharge the battery. The battery could also be charged with a power adapter that was included with the first four generations.

The third generation began including a 30-pin dock connector, allowing for FireWire or USB connectivity. This provided better compatibility with non-Apple machines, as most of them did not have FireWire ports at the time. Eventually, Apple began shipping iPods with USB cables instead of FireWire, although the latter was available separately. As of the first-generation iPod Nano and the fifth-generation iPod Classic, Apple discontinued using FireWire for data transfer (while still allowing for use of FireWire to charge the device) in an attempt to reduce cost and form factor. As of the second-generation iPod Touch and the fourth-generation iPod Nano, FireWire charging ability has been removed. The second-, third-, and fourth-generation iPod Shuffle uses a single 3.5 mm minijack phone connector which acts as both a headphone jack or a USB data and charging port for the dock/cable.

The dock connector also allowed the iPod to connect to accessories, which often supplement the iPod's music, video, and photo playback. Apple sells a few accessories, such as the now-discontinued iPod Hi-Fi, but most are manufactured by third parties such as Belkin and Griffin. Some peripherals use their own interface, while others use the iPod's own screen. Because the dock connector is a proprietary interface, the implementation of the interface requires paying royalties to Apple.

Apple introduced a new 8-pin dock connector, named Lightning, on September 12, 2012 with their announcement of the iPhone 5, the fifth-generation iPod Touch, and the seventh-generation iPod Nano, which all feature it. The new connector replaces the older 30-pin dock connector used by older iPods, iPhones, and iPads. Apple Lightning cables have pins on both sides of the plug so it can be inserted with either side facing up.

Bluetooth connectivity was added to the last model of the iPod Nano, and Wi-Fi to the iPod Touch.

Accessories

thumb|right|150px|The "Made for iPod" logo found on most classic iPod accessories
Many accessories have been made for the iPod line. A large number are made by third party companies, although many, such as the iPod Hi-Fi, are made by Apple. Some accessories add extra features that other music players have, such as sound recorders, FM radio tuners, wired remote controls, and audio/visual cables for TV connections. Other accessories offer unique features like the Nike+iPod pedometer and the iPod Camera Connector. Other notable accessories include external speakers, wireless remote controls, protective case, screen films, and wireless earphones.In-The-Ear Bluetooth Earphones . Retrieved on February 17, 2007. Among the first accessory manufacturers were Griffin Technology, Belkin, JBL, Bose, Monster Cable, and SendStation.

BMW released the first iPod automobile interface,iPod Your BMW . Retrieved on February 17, 2007. allowing drivers of newer BMW vehicles to control an iPod using either the built-in steering wheel controls or the radio head-unit buttons. Apple announced in 2005 that similar systems would be available for other vehicle brands, including Mercedes-Benz,Apple & Mercedes-Benz Unveil iPod Integration Kit , Apple Inc., January 11, 2005. Retrieved on June 20, 2006. Volvo,Apple & Volvo Announce iPod Connectivity For Entire 2005 US Model Line , Apple Inc., January 11, 2005. Retrieved on June 20, 2006. Nissan, Toyota, Alfa Romeo, Ferrari,Apple & Leading Car Companies Team Up to Deliver iPod Integration in 2005 , Apple Inc., January 11, 2005. Retrieved on June 20, 2006. Acura, Audi, Honda,Honda Music Link for iPods, Honda. Retrieved on February 17, 2007. Renault, Infiniti and Volkswagen.Apple Teams Up With Acura, Audi, Honda & Volkswagen to Deliver Seamless iPod Experience , Apple Inc., September 7, 2005. Retrieved on June 20, 2006. Scion offers standard iPod connectivity on all their cars.

Gecko Gear, founded in 2006, sells 100 accessories ranging from protective covers to cases, screen protectors to armbands.

Some independent stereo manufacturers including JVC, Pioneer, Kenwood, Alpine, Sony, and Harman Kardon also have iPod-specific integration solutions. Alternative connection methods include adapter kits (that use the cassette deck or the CD changer port), audio input jacks, and FM transmitters such as the iTrip—although personal FM transmitters are illegal in some countries. Many car manufacturers have added audio input jacks as standard.Car Integration: iPod your car , Apple Inc.. Retrieved on February 17, 2007.

Beginning in mid-2007, four major airlines, United, Continental, Delta, and Emirates, reached agreements to install iPod seat connections. The free service will allow passengers to power and charge an iPod, and view video and music libraries on individual seat-back displays.Apple Teams Up With Continental, Delta, Emirates, & United to deliver iPod Integration , Apple Inc., November 14, 2006. Retrieved on December 7, 2006. Originally KLM and Air France were reported to be part of the deal with Apple, but they later released statements explaining that they were only contemplating the possibility of incorporating such systems.Marsal, Katie. Two of six airlines say there's no ink on iPod deal, AppleInsider, November 15, 2006. Retrieved on December 7, 2006.

Software

The iPod line can play several audio file formats including MP3, AAC/M4A, Protected AAC, AIFF, WAV, Audible audiobook, and Apple Lossless. The iPod Photo introduced the ability to display JPEG, BMP, GIF, TIFF, and PNG image file formats. Fifth- and sixth-generation iPod Classics, as well as third-generation iPod Nanos, can additionally play MPEG-4 (H.264/MPEG-4 AVC) and QuickTime video formats, with restrictions on video dimensions, encoding techniques and data rates.The restrictions vary from generation to generation; for the earliest video iPods, video is required to be Baseline Profile (BP), up to Level 1.3, meaning most significantly no B-frames (BP), a maximum bitrate of 768 kb/s (BP Level 1.3), and a maximum framerate of 30 frame/s at 320×240 resolution. Newer iPods support BP up to level 3.0 (10,000 kb/s), for a maximum framerate of 30 frame/s at 640×480 resolution. Current specifications can be seen at iPod classic Technical Specs, and practical implementations can be seen in the libx264-ipod320.ffpreset and libx264-ipod640.ffpreset preset files for FFmpeg, as discussed in [Ffmpeg-user] Successful ipod h264 encoding , by Daniel Rogers, June 11, 2006. Originally, iPod software only worked with Classic Mac OS and macOS; iPod software for Microsoft Windows was launched with the second-generation model. Unlike most other media players, Apple does not support Microsoft's WMA audio format—but a converter for WMA files without digital rights management (DRM) is provided with the Windows version of iTunes. MIDI files also cannot be played, but can be converted to audio files using the "Advanced" menu in iTunes. Alternative open-source audio formats, such as Ogg Vorbis and FLAC, are not supported without installing custom firmware onto an iPod (e.g., Rockbox).

During installation, an iPod is associated with one host computer. Each time an iPod connects to its host computer, iTunes can synchronize entire music libraries or music playlists either automatically or manually. Song ratings can be set on an iPod and synchronized later to the iTunes library, and vice versa. A user can access, play, and add music on a second computer if an iPod is set to manual and not automatic sync, but anything added or edited will be reversed upon connecting and syncing with the main computer and its library. If a user wishes to automatically sync music with another computer, an iPod's library will be entirely wiped and replaced with the other computer's library.

Interface
thumb|The signature iPod click wheel
iPods with color displays use anti-aliased graphics and text, with sliding animations. All iPods (except the 3rd-generation iPod Shuffle, the 6th & 7th generation iPod Nano, and iPod Touch) have five buttons and the later generations have the buttons integrated into the click wheel – an innovation that gives an uncluttered, minimalist interface. The buttons perform basic functions such as menu, play, pause, next track, and previous track. Other operations, such as scrolling through menu items and controlling the volume, are performed by using the click wheel in a rotational manner. The 3rd-generation iPod Shuffle does not have any controls on the actual player; instead, it has a small control on the earphone cable, with volume-up and -down buttons and a single button for play and pause, next track, etc. The iPod Touch has no click-wheel; instead, it uses a touch screen along with a home button, sleep/wake button, and (on the second and third generations of the iPod Touch) volume-up and -down buttons. The user interface for the iPod Touch is identical to that of the iPhone. Differences include the lack of a phone application. Both devices use iOS.

iTunes Store

The iTunes Store (introduced April 29, 2003) is an online media store run by Apple and accessed through iTunes. The store became the market leader soon after its launchiTunes Music Store Catalog Tops One Million Songs , Apple Inc., August 10, 2004. Retrieved on December 28, 2006. and Apple announced the sale of videos through the store on October 12, 2005. Full-length movies became available on September 12, 2006.Scott-Joynt, Jeremy. Apple targets TV and film market, BBC News, September 12, 2006. Retrieved on September 12, 2006.

At the time the store was introduced, purchased audio files used the AAC format with added encryption, based on the FairPlay DRM system. Up to five authorized computers and an unlimited number of iPods could play the files. Burning the files with iTunes as an audio CD, then re-importing would create music files without the DRM. The DRM could also be removed using third-party software. However, in a deal with Apple, EMI began selling DRM-free, higher-quality songs on the iTunes Stores, in a category called "iTunes Plus." While individual songs were made available at a cost of US$1.29, 30¢ more than the cost of a regular DRM song, entire albums were available for the same price, US$9.99, as DRM encoded albums. On October 17, 2007, Apple lowered the cost of individual iTunes Plus songs to US$0.99 per song, the same as DRM encoded tracks. On January 6, 2009, Apple announced that DRM has been removed from 80% of the music catalog and that it would be removed from all music by April 2009.

iPods cannot play music files from competing music stores that use rival-DRM technologies like Microsoft's protected WMA or RealNetworks' Helix DRM. Example stores include Napster and MSN Music. RealNetworks claims that Apple is creating problems for itself by using FairPlay to lock users into using the iTunes Store. Steve Jobs stated that Apple makes little profit from song sales, although Apple uses the store to promote iPod sales. However, iPods can also play music files from online stores that do not use DRM, such as eMusic or Amie Street.

Universal Music Group decided not to renew their contract with the iTunes Store on July 3, 2007. Universal will now supply iTunes in an 'at will' capacity.Evans, Jonny. Universal confirms iTunes contract change, Macworld UK, July 4, 2007. Retrieved on July 5, 2007.

Apple debuted the iTunes Wi-Fi Music Store on September 5, 2007, in its Media Event entitled "The Beat Goes On...". This service allows users to access the Music Store from either an iPhone or an iPod Touch and download songs directly to the device that can be synced to the user's iTunes Library over a WiFi connection, or, in the case of an iPhone, the telephone network.

Games

Video games are playable on various versions of iPods. The original iPod had the game Brick (originally invented by Apple's co-founder Steve Wozniak) included as an easter egg hidden feature; later firmware versions added it as a menu option. Later revisions of the iPod added three more games: Parachute, Solitaire, and Music Quiz.

In September 2006, the iTunes Store began to offer additional games for purchase with the launch of iTunes 7, compatible with the fifth generation iPod with iPod software 1.2 or later. Those games were: Bejeweled, Cubis 2, Mahjong, Mini Golf, Pac-Man, Tetris, Texas Hold 'Em, Vortex, Asphalt 4: Elite Racing and Zuma. Additional games have since been added. These games work on the 6th and 5th generation iPod Classic and the 5th and 4th generation iPod Nano.

With third parties like Namco, Square Enix, Electronic Arts, Sega, and Hudson Soft all making games for the iPod, Apple's MP3 player has taken steps towards entering the video game handheld console market. Even video game magazines like GamePro and EGM have reviewed and rated most of their games as of late.

The games are in the form of .ipg files, which are actually .zip archives in disguise. When unzipped, they reveal executable files along with common audio and image files, leading to the possibility of third party games. Apple has not publicly released a software development kit (SDK) for iPod-specific development."What's Inside an iPod Game?"  bensinclair.com, September 14, 2006. Apps produced with the iPhone SDK are compatible only with the iOS on the iPod Touch and iPhone, which cannot run click wheel-based games.

File storage and transfer
All iPods except for the iPod Touch can function in "disk mode" as mass storage devices to store data files but this may not be the default behavior.  If an iPod is formatted on a Mac OS computer, it uses the HFS+ file system format, which allows it to serve as a boot disk for a Mac computer. If it is formatted on Windows, the FAT32 format is used. With the release of the Windows-compatible iPod, the default file system used on the iPod line switched from HFS+ to FAT32, although it can be reformatted to either file system (excluding the iPod Shuffle which is strictly FAT32). Generally, if a new iPod (excluding the iPod Shuffle) is initially plugged into a computer running Windows, it will be formatted with FAT32, and if initially plugged into a Mac running Mac OS it will be formatted with HFS+.

Unlike many other MP3 players, simply copying audio or video files to the drive with a typical file management application will not allow an iPod to properly access them. The user must use software that has been specifically designed to transfer media files to iPods so that the files are playable and viewable. Usually iTunes is used to transfer media to an iPod, though several alternative third-party applications are available on a number of different platforms.

iTunes 7 and above can transfer purchased media of the iTunes Store from an iPod to a computer, provided that computer containing the DRM protected media is authorized to play it.

Media files are stored on an iPod in a hidden folder, along with a proprietary database file. The hidden content can be accessed on the host operating system by enabling hidden files to be shown. The media files can then be recovered manually by copying the files or folders off the iPod. Many third-party applications also allow easy copying of media files off of an iPod.

Models and features

While the suffix "Classic" was not introduced until the sixth generation, it has been applied here retroactively to all generic iPods for clarity.

Patent disputes
In 2005, Apple faced two lawsuits claiming patent infringement by the iPod line and its associated technologies:Apple faces patent lawsuits over its iPod, ChannelRegister, March 10, 2005. Retrieved on February 17, 2007. Advanced Audio Devices claimed the iPod line breached its patent on a "music jukebox",U.S. Patent 6,587,403 — Advanced Audio Devices' "music jukebox" patent. while a Hong Kong-based IP portfolio company called Pat-rights filed a suit claiming that Apple's FairPlay technology breached a patentU.S. Patent 6,665,797 — "Protection of software again against unauthorized use" (corrected to "Computer Apparatus/Software Access Control"). issued to inventor Ho Keung Tse. The latter case also includes the online music stores of Sony, RealNetworks, Napster, and Musicmatch as defendants.Apple, Sony among those named in new DRM lawsuit, AppleInsider, August 16, 2005. Retrieved on February 17, 2007.

Apple's application to the United States Patent and Trademark Office for a patent on "rotational user inputs",U.S. patent application 20030095096 Apple Inc.'s application on "rotational user inputs". as used on the iPod interface, received a third "non-final rejection" (NFR) in August 2005. Also in August 2005, Creative Technology, one of Apple's main rivals in the MP3 player market, announced that it held a patentU.S. Patent 6,928,433 Creative Technology's "Zen" patent. on part of the music selection interface used by the iPod line, which Creative Technology dubbed the "Zen Patent", granted on August 9, 2005.Creative wins MP3 player patent, BBC News, August 30, 2005. Retrieved on February 17, 2007. On May 15, 2006, Creative filed another suit against Apple with the United States District Court for the Northern District of California. Creative also asked the United States International Trade Commission to investigate whether Apple was breaching U.S. trade laws by importing iPods into the United States.

On August 24, 2006, Apple and Creative announced a broad settlement to end their legal disputes. Apple will pay Creative US$100 million for a paid-up license, to use Creative's awarded patent in all Apple products. As part of the agreement, Apple will recoup part of its payment, if Creative is successful in licensing the patent. Creative then announced its intention to produce iPod accessories by joining the Made for iPod program.Apple & Creative Announce Broad Settlement... , Apple Inc.. Retrieved on February 17, 2007.

Sales
thumb|right|400px|iPod quarterly sales. Click for table of data and sources. Note that Q1 is October through December of previous year, the holiday season.

Since October 2004, the iPod line has dominated digital music player sales in the United States, with over 90% of the market for hard drive-based players and over 70% of the market for all types of players.Marsal, Katie. iPod: how big can it get?, AppleInsider, May 24, 2006. Retrieved on February 17, 2007. During the year from January 2004 to January 2005, the high rate of sales caused its U.S. market share to increase from 31% to 65% and in July 2005, this market share was measured at 74%. In January 2007 the iPod market share reached 72.7% according to Bloomberg Online.

On January 8, 2004, Hewlett-Packard (HP) announced that they would sell HP-branded iPods under a license agreement from Apple. Several new retail channels were used—including Walmart—and these iPods eventually made up 5% of all iPod sales. In July 2005, HP stopped selling iPods due to unfavorable terms and conditions imposed by Apple.HP to stop selling Apple's iPods, AppleInsider, July 29, 2005. Retrieved on August 6, 2007.

In January 2007, Apple reported record quarterly revenue of US$7.1 billion, of which 48% was made from iPod sales.

On April 9, 2007, it was announced that Apple had sold its one-hundred millionth iPod, making it the biggest-selling digital music player of all time. In April 2007, Apple reported second-quarter revenue of US$5.2 billion, of which 32% was made from iPod sales. Apple and several industry analysts suggest that iPod users are likely to purchase other Apple products such as Mac computers.

On October 22, 2007, Apple reported quarterly revenue of US$6.22 billion, of which 30.69% came from Apple notebook sales, 19.22% from desktop sales and 26% from iPod sales. Apple's 2007 year revenue increased to US$24.01 billion with US$3.5 billion in profits. Apple ended the fiscal year 2007 with US$15.4 billion in cash and no debt.Apple Reports Fourth Quarter 2007 Results , Apple Inc., October 22, 2007. Retrieved on October 22, 2007.

On January 22, 2008, Apple reported the best quarter revenue and earnings in Apple's history so far. Apple posted record revenue of US$9.6 billion and record net quarterly profit of US$1.58 billion. 42% of Apple's revenue for the First fiscal quarter of 2008 came from iPod sales, followed by 21% from notebook sales and 16% from desktop sales.Apple Inc. (January 22, 2008). Apple Reports First Quarter Results . Press release. Retrieved on January 23, 2008

On October 21, 2008, Apple reported that only 14.21% of total revenue for fiscal quarter 4 of the year 2008 came from iPods.AppleInsider (October 27, 2008).  Retrieved on October 27, 2008 At the September 9, 2009 keynote presentation at the Apple Event, Phil Schiller announced total cumulative sales of iPods exceeded 220 million.World of Apple. (September 9, 2009). Live Coverage From Apple’s “It’s Only Rock and Roll” Event . Press release. Retrieved on September 9, 2009 The continual decline of iPod sales since 2009 has not been a surprising trend for the Apple corporation, as Apple CFO Peter Oppenheimer explained in June 2009: "We expect our traditional MP3 players to decline over time as we cannibalize ourselves with the iPod Touch and the iPhone." Since 2009, the company's iPod sales have continually decreased every financial quarter and in 2013 a new model was not introduced onto the market.

, Apple reported that total number of iPods sold worldwide was 350 million.

Industry impact
iPods have won several awards ranging from engineering excellence,iPod and Bluetooth lead to prizes, BBC News, June 3, 2005. Retrieved on March 20, 2007. to most innovative audio product, to fourth best computer product of 2006.Apple wins 5 'World Class' awards, MacNN. Retrieved on February 17, 2007. iPods often receive favorable reviews; scoring on looks, clean design, and ease of use. PC World says that iPod line has "altered the landscape for portable audio players". Several industries are modifying their products to work better with both the iPod line and the AAC audio format. Examples include CD copy-protection schemes,Apple, iPod, and CD Copy Protection, MacRumors. Retrieved on February 17, 2007. and mobile phones, such as phones from Sony Ericsson and Nokia, which play AAC files rather than WMA.

Besides earning a reputation as a respected entertainment device, the iPod has also been accepted as a business device. Government departments, major institutions, and international organizations have turned to the iPod line as a delivery mechanism for business communication and training, such as the Royal and Western Infirmaries in Glasgow, Scotland, where iPods are used to train new staff.Hospitals train staff with iPods, BBC News, March 29, 2006. Retrieved on June 16, 2007.

iPods have also gained popularity for use in education. Apple offers more information on educational uses for iPods on their website, including a collection of lesson plans. There has also been academic research done in this area in nursing education and more general K-16 education. Duke University provided iPods to all incoming freshmen in the fall of 2004, and the iPod program continues today with modifications. Entertainment Weekly put it on its end-of-the-decade, "best-of" list, saying, "Yes, children, there really was a time when we roamed the earth without thousands of our favorite jams tucked comfortably into our hip pockets. Weird."

The iPod has also been credited with accelerating shifts within the music industry. The iPod's popularization of digital music storage allows users to abandon listening to entire albums and instead be able to choose specific singles which hastened the end of the Album Era in popular music.Tejas Morey. "How iTunes Changed The Music Industry Forever." MensXP (Times of India). Retrieved January 5, 2014.

Criticism

Battery problems
The advertised battery life on most models is different from the real-world achievable life. For example, the fifth-generation 30 GB iPod is advertised as having up to 14 hours of music playback. An MP3.com report stated that this was virtually unachievable under real-life usage conditions, with a writer for MP3.com getting on average less than 8 hours from an iPod.MP3 Insider: The truth about your battery life , mp3.com, March 13, 2006. Retrieved on July 10, 2006. In 2003, class action lawsuits were brought against Apple complaining that the battery charges lasted for shorter lengths of time than stated and that the battery degraded over time.Apple investigates iPod batteries, BBC News, February 10, 2004. Retrieved on March 20, 2007. The lawsuits were settled by offering individuals with first or second-generation iPods either US$50 store credit or a free battery replacement and offering individuals with third-generation iPods an extended warranty that would allow them to get a replacement iPod if they experienced battery problems.Horwitz, Jeremy. Apple’s iPod Battery Settlement, Explained, iLounge, June 10, 2005. Retrieved on August 27, 2006.

iPod batteries are not designed to be removed or replaced by the user, although some users have been able to open the case themselves, usually following instructions from third-party vendors of iPod replacement batteries. Compounding the problem, Apple initially would not replace worn-out batteries. The official policy was that the customer should buy a refurbished replacement iPod, at a cost almost equivalent to a brand new one. All lithium-ion batteries lose capacity during their lifetime even when not in useThe Curse of Lithium Ion Batteries, MP3 Newswire, January 6, 2006. Retrieved on November 30, 2006. (guidelines are available for prolonging life-span) and this situation led to a market for third-party battery replacement kits.

Apple announced a battery replacement program on November 14, 2003, a week beforeiPod Battery FAQ . Retrieved on November 26, 2006. a high publicity stunt and website by the Neistat Brothers.Neistat, Casey. A Message From the Neistat Brothers, November 20, 2003. Retrieved on February 17, 2007. The initial cost was US$99,Apple offers iPod battery replacement service , MacMinute, November 14, 2003. Retrieved on November 26, 2006. and it was lowered to US$59 in 2005. One week later, Apple offered an extended iPod warranty for US$59.AppleCare for iPod now available , MacMinute, November 21, 2003. Retrieved on November 26, 2006. For the iPod Nano, soldering tools are needed because the battery is soldered onto the main board. Fifth generation iPods have their battery attached to the backplate with adhesive.Ecker, Clint. Vivisection of the Video iPod, Ars Technica, October 19, 2005. Retrieved on November 26, 2006.Disassemble Guide for Video iPod. Retrieved on November 26, 2006.

The first generation iPod Nano may overheat and pose a health and safety risk. Affected iPod Nanos were sold between September 2005 and December 2006. This is due to a flawed battery used by Apple from a single battery manufacturer. Apple recommended that owners of affected iPod Nanos stop using them. Under an Apple product replacement program, affected Nanos were replaced with current generation Nanos free of charge.

Reliability and durability
iPods have been criticized for alleged short lifespan and fragile hard drives. A 2005 survey conducted on the MacInTouch website found that the iPod line had an average failure rate of 13.7% (although they note that comments from respondents indicate that "the true iPod failure rate may be lower than it appears"). It concluded that some models were more durable than others.iPod Reliability Survey , MacInTouch, November 28, 2005. Retrieved on October 29, 2006. In particular, failure rates for iPods employing hard drives were usually above 20% while those with flash memory had a failure rate below 10%. In late 2005, many users complained that the surface of the first-generation iPod Nano can become scratched easily, rendering the screen unusable.Apple responds to iPod nano screen concerns, Macworld, September 27, 2005. Retrieved on February 17, 2007.Arthur, Charles. iPod Nano owners in screen scratch trauma, The Register, September 25, 2005. Retrieved on February 17, 2007. A class-action lawsuit was also filed.Fried, Ina. Suit filed over Nano scratches, CNet News, October 21, 2005. Retrieved on February 17, 2007. Apple initially considered the issue a minor defect, but later began shipping these iPods with protective sleeves.

Labor disputes
On June 11, 2006, the British tabloid The Mail on Sunday reported that iPods are mainly manufactured by workers who earn no more than US$50 per month and work 15-hour shifts.Inside Apple's iPod factories, Macworld UK, June 12, 2006. Retrieved on March 20, 2007. Apple investigated the case with independent auditors and found that, while some of the plant's labor practices met Apple's Code of Conduct, others did not: employees worked over 60 hours a week for 35% of the time and worked more than six consecutive days for 25% of the time.Millard, Elizabeth. Is It Ethical To Own an iPod?. Retrieved on March 20, 2007.

Foxconn, Apple's manufacturer, initially denied the abuses,Foxconn denies iPod 'sweatshop' claims, MacNN, June 19, 2006. Retrieved on February 17, 2007. but when an auditing team from Apple found that workers had been working longer hours than were allowed under Chinese law, they promised to prevent workers working more hours than the code allowed. Apple hired a workplace standards auditing company, Verité, and joined the Electronic Industry Code of Conduct Implementation Group to oversee the measures. On December 31, 2006, workers at the Foxconn factory in Longhua, Shenzhen formed a union affiliated with the All-China Federation of Trade Unions, the Chinese government-approved union umbrella organization.McDonald's and KFC seeking to resolve Chinese minimum wage issue ..., April 5, 2007, nytimes.com. Retrieved 2010 5 27.Wal-Mart backs down and allows Chinese workers to join union, August 11, 2006, Jonathan Watts, The Guardian

In 2010, a number of workers committed suicide at a Foxconn operations in China. Apple, HP, and others stated that they were investigating the situation. Foxconn guards have been videotaped beating employees. Another employee killed himself in 2009 when an Apple prototype went missing, and claimed in messages to friends, that he had been beaten and interrogated.Suicides Spark Inquiries Apple, H-P to Examine Asian Supplier After String of Deaths at Factory, Jason Dean, Ting-i Tsai, May 27, 2010, accessed May 27, 2010The Foxconn Suicides, May 28, 2010, wsj.com, WSJ opinion, accessed May 27, 2010

As of 2006, the iPod was produced by about 14,000 workers in the U.S. and 27,000 overseas. Further, the salaries attributed to this product were overwhelmingly distributed to highly skilled U.S. professionals, as opposed to lower-skilled U.S. retail employees or overseas manufacturing labor. One interpretation of this result is that U.S. innovation can create more jobs overseas than domestically.

Timeline of iPod models

See also

 Comparison of portable media players
 Comparison of iPod managers
 iPhone
 Podcast

References

External links

  – official site at Apple Inc.
 iPod troubleshooting basics and service FAQ at Apple Inc.
 Apple's 21st century Walkman article, Brent Schlender, Fortune, November 12, 2001
 , Steven Levy, Newsweek, July 26, 2004
 The Perfect Thing article, Steven Levy, Wired, November 2006
 iPod (1st generation) complete disassembly at TakeItApart.com

 
Category:Apple Inc. hardware
Category:ITunes
Category:Portable media players
Category:Foxconn
Category:Computer-related introductions in 2001
Category:Products introduced in 2001