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Organizations, entities, or tools employed for the research and development, design, manufacturing, acquisition, delivery, integration, operations and maintenance, and disposal of systems and system components.
NIST SP 800-53 Rev. 5
An information technology product or product component that contains programmable logic and that is critically important to the functioning of an information system.
NIST SP 800-53 Rev. 4 [Superseded] under Supply Chain Element