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other system

Definition(s):

  A system that the system of interest interacts with in the operational environment. These systems may provide services to the system of interest (i.e., the system of interest is dependent on the other systems) or be the beneficiaries of services provided by the system of interest (i.e., other systems are dependent on the system of interest).
Source(s):
NIST SP 800-160 Vol. 2 Rev. 1 from ISO/IEC/IEEE 15288:2015