Individuals

 – An assessment object that includes people applying specifications,   mechanisms, or activities.   SOURCE: SP 800-53A Industrial Control System – An information system used to control industrial processes such as   manufacturing, product handling, production, and distribution.   Industrial control systems include supervisory control and data   acquisition systems (SCADA) used to control geographically   dispersed assets, as well as distributed control systems (DCS) and   smaller control systems using programmable logic controllers to   control localized processes.   SOURCE: SP 800-53; SP 800-53A; SP 800-39; SP 800-30 Informal Security Policy – Natural language description, possibly supplemented by   mathematical arguments, demonstrating the correspondence of the   functional specification to the high-level design.