Apple is a corporation that designs, manufactures, and markets mobile communication and media devices, personal computers, portable digital music players, and sells a variety of related software, services, peripherals, networking solutions, and third-party digital content and applications. Apple provides many products and services, including iPhone, iPad, iPod, Mac, Apple TV, a portfolio of consumer and professional software applications, the iOS and OS X operating systems, iCloud, and accessories, service, and support offerings. It sells its products worldwide through its retail stores, online stores, direct sales force, and third-party cellular network carriers, wholesalers, retailers, and value-added resellers to the consumer, and also sells third-party iPhone, iPad, Mac, and iPod compatible products, including application software and accessories, through its online and retail stores.