Unit which exists objectively, is demarcated and identifiable
Note 1: An item can be virtual or physical in nature.
Note 2: An item can be a device, subsystem, software program, plan, living organism, organization or the like.
Note 3: An item has a life cycle.
Source: Industrie 4.0 – Begriffe/Terms, VDI Statusreport Industrie 4.0 (April 2017)