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Organizations, departments, facilities, or personnel responsible for a particular systems security engineering activity conducted within an engineering process (e.g., operations elements, logistics elements, maintenance elements, and training elements).
NIST SP 800-160 Vol. 1
ICT system element is a member of a set of elements that constitutes a system.
NIST SP 800-161 under Element
A statement about an ISCM concept that is true for a well-implemented ISCM program.
NIST SP 800-137A
ICT system element member of a set of elements that constitutes a system.
NISTIR 7622 under Element from - Adapted