An autotroph or producer, is an organism that produces complex organic compounds from simple substances present in its surroundings, generally using energy from light or inorganic chemical reactions. They are the producers in a food chain, such as plants on land or algae in water. They do not need a living source of energy or organic carbon. Autotrophs can reduce carbon dioxide to make organic compounds for biosynthesis and also create a store of chemical energy. Most autotrophs use water as the
iOS jailbreaking is the process of removing software restrictions imposed by Apple's on iOS and tvOS. It does this by using a series of software exploits. Jailbreaking permits root access to iOS, allowing the downloading and installation of additional applications, extensions, and themes that are unavailable through the official Apple App Store.
Testing conducted by Apple in August 2012 using preproduction iPod nano hardware and software. The playlist contained 358 unique audio tracks consisting of content imported from CDs using iTunes (128-Kbps AAC) and content purchased from the iTunes Store (256-Kbps AAC); video content was purchased from the iTunes Store. Battery tests are conducted with specific iPod units; actual results may vary.