The iPod Mini (stylized and marketed as the iPod mini) is a digital audio player that was designed and marketed by Apple Inc. While it was sold, it was the midrange model in Apple's iPod product line.
 It was announced on January 6, 2004 and released on February 20 of the same year.
 A second generation version was announced on February 23, 2005 and released immediately.
 While it was in production, it was one of the most popular electronic products on the market, with consumers often unable to find a retailer with the product in stock.
 The iPod Mini was discontinued on September 7, 2005 and was replaced by the iPod Nano.
The Apple iPod+HP is an Apple iPod 4G with an HP logo on the back, distributed through HP.
The iPod Classic (stylized and marketed as iPod classic and formerly just iPod) is a portable media player created and formerly marketed by Apple Inc.
Chess and Backgammon Classics, retitled Chess Classics a week after release, is a video game by Gameloft for the iPod Nano (3rd and 4th generation), the iPod classic, and the iPod (5th generation).
The Apple iPod line has been upgraded many times, and each significant revision is called a "generation".
 Only the most recent generation and refurbished units of previous generations of the iPod line are available from Apple for each model (classic, nano, shuffle, touch).
 Each new generation usually has more features and refinements while typically being physically smaller and lighter than its predecessor, while usually (but not always) retaining the older model's price tag.
 Notable changes include the touch-sensitive click wheel replacing the mechanical scroll wheel, use of color displays, and flash memory replacing hard disks.
The fifth generation iPod Touch (stylized and marketed as the iPod touch, and colloquially known as the iPod Touch 5G or iPod Touch 5) was unveiled at Apple's media event alongside the iPhone 5 on September 12, 2012 and was released on October 11, 2012.
 An all-purpose pocket computer designed and marketed by Apple Inc. with a touchscreen-based user interface, it succeeded the 4th generation iPod Touch.
 It is compatible with up to iOS 9.3.5 which was released on the 25th of August 2016
Apple Inc.'s MFi Program ("Made for iPhone/iPod/iPad") is a licensing program for developers of hardware and software peripherals that work with Apple's iPod, iPad and iPhone.
 The name is a shortened version of the original long-form Made for iPod.
 The program covers various device connectors including the headphone jack, original dock connector and the newer Lightning connector, as well as AirPlay support.
 Companies joining the MFi program and passing certification tests are able to display certain MFi-related logos on their product packaging, like the "Made for iPod" badge.
The iPod Touch (stylized and marketed as iPod touch) is an iOS-based all-purpose handheld PC designed and marketed by Apple Inc. with a user interface that is touchscreen-based.
 It can be used as a music and video player, digital camera, handheld game device, and personal digital assistant (PDA).
 It connects to the Internet only through Wi-Fi base stations, does not use cellular network data, and is therefore not a smartphone, though it has a similar design to the iPhone and is often referred to as the "iPhone without a data plan".
 Furthermore, it does not fit in Apple's iPhone accessories such as their leather cases.
 As of May 2013, 100 million iPod Touch units had been sold since 2007.
The sixth-generation iPod Touch (stylized and marketed as the iPod touch, and colloquially known as the iPod touch 6G, iPod touch 6, or iPod touch (2015) ) is a multipurpose pocket computer designed and marketed by Apple Inc. with a touchscreen-based user interface.
 It is the successor to the iPod Touch (5th generation), becoming the first major update to the iPod lineup in more than two and a half years.
 It was released on the online Apple Store on July 15, 2015, along with a new iPod Nano and iPod Shuffle, which received minor upgrades.
The Nike+iPod Sports Kit is an activity tracker device, developed by Nike, Inc., which measures and records the distance and pace of a walk or run.
 The Nike+iPod consists of a small transmitter device attached to or embedded in a shoe, which communicates with either the Nike+ Sportband, a receiver plugged into an iPod Nano, or directly with a 2nd Generation iPod Touch (or higher), iPhone 3GS, iPhone 4, iPhone 4S, iPhone 5, iPhone 5C, iPhone 5S, or a Nike+ Sportwatch.
 If using the iPod or the iPhone, iTunes software can be used to view the walk or run history.

Question: What type of device is the iPod Classic, formerly known just as the iPod, marketed by Apple, and with an alternative 4G version known as the Apple iPod+HP?
Answer: portable media player