What is iPod? iPod is a brand of portable media players designed and marketed by Apple and launched on October 23, 2001. The line-up currently consists of the hard drive-based flagship iPod classic, the high-end touchscreen iPod touch, the mid-level video-capable iPod nano, and the entry-level screenless iPod shuffle. Former products include the compact iPod mini (replaced by the iPod nano) and the high-end spin-off iPod photo (re-integrated into the main iPod classic line). iPod classic models store media on an internal hard drive, while all other models use flash memory to enable their smaller size (the discontinued mini used a Microdrive miniature hard drive). As with many other digital music players, iPods, excluding the iPod Touch, can also serve as external data storage devices. Apple's iTunes software is used to transfer music to the devices. As a jukebox application, iTunes stores a music library on the user's computer and can play, burn, and rip music from a CD. It also transfers photos, videos, games, and calendars to those iPod models that support them. Apple focused its development on the iPod's unique user interface and its ease of use, rather than on technical capability. As of October 2007, the iPod had sold over 119 million units worldwide (stated in "The Beat Goes On" conference) making it the best-selling digital audio player series in history. Which iPod you are using? iPod touch The iPod touch is a portable media player designed and marketed by Apple Inc. It is the top-of-the-line model in Apple's iPod family. The product was unveiled to the general public on September 5, 2007 as part of an event dubbed "The Beat Goes On",featuring the introduction of Cover Flow and Multi-Touch to the iPod line. The iPod touch can be purchased with 8 or 16 GB of flash memory. It also has Wi-Fi and includes Safari, Apple's web browser. The iPod touch is the first generation of the iPod line to include wireless access to the iTunes Store. The iPod touch also has the capability to detect the current and last 10 songs playing in a Starbucks café within the vicinity. The iPod touch's multi-touch interface is exactly like that of the iPhone. Like the iPhone, the iPod touch includes a physical home button separate from the touch screen. The home screen includes a list of buttons corresponding to the available applications, including Music, Videos, Photos, iTunes, Safari, YouTube, Mail, Maps, and Widgets.The iPod touch comes preloaded with 28 wallpaper photos, some of which are figures from the iPod advertisements. iPod classic The iPod classic is a portable media player marketed by Apple Inc.. It is the flagship model in Apple's iPod family. To date, there have been six generations of the iPod classic, as well as a spin-off (the iPod photo) that was later re-integrated into the main classic line. All generations use a 1.8" hard drive for storage. The "classic" retronym was introduced with the introduction of the sixth-generation iPod classic on September 5, 2007, prior to this, iPod classics were referred to as iPods. The first generation iPod (2001) Apple introduced the first-generation iPod classic on October 23, 2001. The first iPod featured a 5 GB hard drive capable of storing 1,000 songs encoded using MP3 and was priced at US$399. Among the iPod's innovations were its small size, achieved using a 1.8" hard drive, whereas its competitors were using 2.5" hard drives at the time, and its easy-to-use navigation, which was controlled using a mechanical scroll wheel, a center OK button, and 4 auxiliary buttons around the wheel. The iPod had a rated battery life of 12 hours. On March 20, 2002, Apple introduced a 10 GB model of the iPod classic for US$499. vCard compatibility was added, as well, allowing iPods to display business card information synced from a Mac. The second generation iPod (2002) Introduced on July 17, 2002, the second generation iPod classic. Using the same body style as the first generation, the hold switch was redesigned, a cover was added to the FireWire port, and the mechanical wheel was replaced with a touch-sensitive wheel. The front place also had rounded corners and edges. The second-generation class was available in 10 GB for US$399 and 20 GB for US$499. The first-generation 5 GB classic was carried over, but its price was reduced to US$299. Notably, Apple began selling PC-compatible versions of the iPod starting with the second generation. These versions came with a 4-pin to 6-pin FireWire adapter and were bundled with Musicmatch Jukebox instead of iTunes. In December 2002, Apple unveiled its first limited edition iPods, with either Madonna’s, Tony Hawk’s, or Beck’s signature or No Doubt's band logo engraved on the back for an extra US$50. 3rd Generation iPod (2003) On April 18, 2003, Apple announced a completely redesigned third-generation iPod classic. Thinner than the previous models, the third generation models replaced the FireWire port with a new Dock Connector and introduced the Touch Wheel, a completely non-mechanical interface with the four auxiliary buttons located in a row between the screen and the touch wheel. The front place had rounded edges, and the rear casing was slightly rounded, as well. A new wired remote connector was introduced. Whereas first and second generation classics had an auxiliary ring around the headphone port for the remote, the third generation classic had a 4-pin jack adjacent to the headphone port. A 10 GB model was sold for US$299, a 15 GB model for US$399, and a 30 GB model for US$499. All iPods were now compatible with Mac and PC out of the box, simply requiring Windows users to reformat the iPod before use on a PC and both iTunes and Musicmatch were bundled with all iPods. The battery life was reduced to 8 hours, partially due to the use of a lithium-ion battery as opposed to a lithium polymer battery. The 15 GB model was replaced by a 20 GB model and the 30 GB model was upgraded to 40 GB on September 8, 2003. Support for Musicmatch was also discontinued at this time and only iTunes was included in the box. Fourth generation (2004) Announced on July 19, 2004, the fourth-generation iPod classic replaced the touch wheel from the third generation with the Click Wheel from the iPod mini, putting the four auxiliary buttons underneath a touch-sensitive scroll wheel. The casing was also slightly slimmer. Pricing was reduced and the lineup was simplified, as the 20 GB model was sold for US$299 and the 40 GB model for US$399. Notably, Apple began reducing pack-in accessories starting with the fourth generation. While a dock, carrying case, and wired remote were previously included with higher-end iPods, the higher-level 40 GB iPod only came with a dock. he fifth generation iPod was introduced on October 12, 2005, shortly after the introduction of the iPod nano. The fifth generation classic, known informaly as the iPod video, featured a 2.5" 320x240 QVGA screen and a smaller Click Wheel. The fifth generation iPod is the first classic iPod to be available in an alternative color scheme in a non-special edition form, as a black option was added alongside "Signature iPod White", and marked the second full redesign of the iPod's aesthetic with its re-arranged proportions, its return to a fully flat front plate, and its more rounded rear casing. The 4-pin remote port was removed as well, causing backwards accessory compatibility issues. A 30 GB model was offered for US$299 and a 60 GB model was offered for US$399. The 5G iPod was also offered in the U2 special edition for US$349 with 30 GB. The fifth generation iPod (2005) Announced on 12 October 2005, the fifth generation iPod plays video in MP4 (up to 2.5 Mbit/s) and H.264 (up to 1.5 Mbit/s, baseline profile only) formats. Video such as TV shows, podcasts, music videos, and movies may be purchased from online stores such as the iTunes Store, or downloaded from Google Video and other sources, then imported to the iPod via iTunes software. The fifth generation iPod was updated on September 12, 2006. This update included a brighter screen, a search feature, gapless playback, support for iPod games, and newly designed earphones. The refreshed iPod also had a longer video playback time. Support for iPod games and gapless playback were enabled on original fifth generation classics through a firmware update. An iTunes installation CD was also no longer bundled, requiring users to download iTunes from Apple's website. During this update, the 60 GB model was replaced with an 80 GB model, and prices were cut by US$50 for both the 30 GB (US$249) and the 80 GB (US$349) models. Sixth generation (2007) During a special iPod-centric event on September 5, 2007, Steve Jobs introduced the sixth generation iPod and the retronym suffix "classic". Featuring slightly thinner bodies, the sixth generation classic also sported dramatically improved battery life, claiming up to 40 hours of music playback and 7 hours of video playback. The front plate of the iPod is now made of anodized aluminum instead of polycarbonate plastic, and "Signature iPod White" has been replaced by silver. The sixth generation classic also introduced a completely overhauled user interface, incorporating more graphics and Cover Flow. The sixth generation classic is offered in an 80 GB (20,000 songs) model for US$249/GBP£159 and a 160 GB (40,000 songs) model for US$349/GBP£229. The U2 special edition has been dropped.