An upgrade (UPG) is an updated version of existing hardware, software or firmware and is usually sold at a reduced price with a full version. The purpose of an upgrade is improved and updated product features, including performance, product life, usefulness and convenience. (Quelle: Upgrade (UPG), www.techopedia.com/definition/4380/upgrade-upg, Einsichtsdatum: 28.07.2017)