Information:  - Real Racing is a 2009 racing game developed and published by Firemint for iOS . It was released on June 8 , 2009 for iPhone and iPod Touch , and later a HD version was released for the iPad , which featured improved graphics to take full advantage of the iPad 's capabilities . The game was a critical and commercial success , and has led to two sequels ; Real Racing 2 in 2010 and Real Racing 3 in 2013 .  - A handheld PC, or H/PC for short, is a computer built around a form factor which is smaller than any standard laptop computer. It is sometimes referred to as a "palmtop computer". The first hand-held device compatible with desktop IBM personal computers of the time was the Atari Portfolio of 1989. Other early models were the Poqet PC of 1989 and the Hewlett Packard HP 95LX of 1991. Other DOS-compatible hand-held computers also existed. Some handheld PCs use Microsoft's Windows CE operating system, with the term also covering Windows CE devices released by the broader commercial market.  - A mobile operating system (or mobile OS) is an operating system for smartphones, tablets, personal digital assistants (PDAs), or other mobile devices. While computers such as typical laptops are mobile, the operating systems usually used on them are not considered mobile ones, as they were originally designed for desktop computers that historically did not have or need specific "mobile" features. This distinction is becoming blurred in some newer operating systems that are hybrids made for both uses. So-called mobile operating systems, or even only smartphones running them, now represent most (web) use (on weekends and averaged for whole weeks). Mobile operating systems, are now, as of late 2016, the most used kind, with traditional desktop OS, now a minority use kind; see Crossover to smartphones_having_majority_share. However, variations occur in popularity by regions, while desktop-minority also applies on some days in e.g., the US and UK.  - Apple is an American multinational technology company headquartered in Cupertino, California, a suburb of San Jose, that designs, develops, and sells consumer electronics, computer software, and online services. Its hardware products include the iPhone smartphone, the iPad tablet computer, the Mac personal computer, the iPod portable media player, the Apple Watch smartwatch, and the Apple TV digital media player. Apple's consumer software includes the macOS and iOS operating systems, the iTunes media player, the Safari web browser, and the iLife and iWork creativity and productivity suites. Its online services include the iTunes Store, the iOS App Store and Mac App Store, Apple Music, and iCloud.  - iPhone is a line of smartphones designed and marketed by Apple Inc. They run Apple's iOS mobile operating system. The first generation iPhone was released on June 29, 2007; the most recent iPhone model is the iPhone 7, which was unveiled at a special event on September 7, 2016.  - A smartphone is a mobile phone (also known as cell phones or cell mobiles) with an advanced mobile operating system that combines features of a personal computer operating system with other features useful for mobile or handheld use. Smartphones, which are usually pocket-sized, typically combine the features of a mobile phone, such as the abilities to place and receive voice calls and create and receive text messages, with those of other popular digital mobile devices like personal digital assistants (PDAs), such as an event calendar, media player, video games, GPS navigation, digital camera and digital video camera. Smartphones can access the Internet and can run a variety of third-party software components ("apps" from Google Play, Apple App Store, etc). They typically have a color display with a graphical user interface that covers more than 76% of the front surface. The display is almost always a touchscreen and sometimes additionally a touch-enabled keyboard like the Priv/Passport BlackBerrys, which enables the user to use a virtual keyboard to type words and numbers and press onscreen icons to activate "app" features.  - iOS (formerly iPhone OS) is a mobile operating system created and developed by Apple Inc. exclusively for its hardware. It is the operating system that presently powers many of the company's mobile devices, including the iPhone, iPad, and iPod Touch. It is the second most popular mobile operating system globally after Android. iPad tablets are also the second most popular, by sales, against Android since 2013.   - 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 8 months after iTunes (Macintosh version) was released. The most recent iPod redesigns were announced on July 15, 2015. There are three current versions of the iPod: the ultra-compact iPod Shuffle, the compact iPod Nano and the touchscreen iPod Touch.  - A personal digital assistant (PDA), also known as a handheld PC, or personal data assistant, is a mobile device that functions as a personal information manager. The term evolved from Personal Desktop Assistant, a software term for an application that prompts or prods the user of a computer with suggestions or provides quick reference to contacts and other lists. PDAs were largely discontinued in the early 2010s after the widespread adoption of highly capable smartphones, in particular those based on iOS and Android.  - 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 phone". 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. It is also the most popular iPod model.    After reading the paragraphs above, we are interested in knowing the entity with which 'real racing' exhibits the relationship of 'platform'. Find the answer from the choices below.  Choices: - android  - atari  - dos  - handheld  - internet  - ios  - iphone  - ipod  - mobile phone  - personal computer  - personal digital assistant  - web  - web browser  - windows
The answer to this question is:
android