A discrete, identifiable information technology asset (e.g., hardware, software, firmware) that represents a building block of an information system. Information system components include commercial information technology products.
Sources:
CNSSI 4009-2015 under information system component

  A discrete identifiable information technology asset that represents a building block of a system and may include hardware, software, and firmware.
Sources:
NIST SP 800-128 under system component
NIST SP 800-172 under system component from NIST SP 800-128
NIST SP 800-172A under system component from NIST SP 800-128
NIST SP 800-37 Rev. 2 under system component from NIST SP 800-128
NIST SP 800-53 Rev. 5 under system component from NIST SP 800-128
NIST SP 800-53A Rev. 5 under system component from NIST SP 800-128
NIST SP 800-171 Rev. 2 under system component from NIST SP 800-128

  A discrete identifiable IT asset that represents a building block of an information system.
Sources:
NIST SP 800-128 under Information System Component
NIST SP 800-128 under information system component

  A system, component, application, etc., that is based upon technology which is used to electronically process, store, or transmit information.
Sources:
NIST SP 800-128 under Information Technology Product

  See system component.
Sources:
NIST SP 800-128
NIST SP 800-37 Rev. 2
NIST SP 800-53 Rev. 5

  See information system component.
Sources:
CNSSI 4009-2015

  Discrete identifiable information technology assets that represent a building block of a system and include hardware, software, firmware, and virtual machines.
Sources:
NIST SP 800-160 Vol. 2 Rev. 1 under system component from NIST SP 800-53 Rev. 5

  A discrete identifiable information or operational technology asset that represents a building block of a system and may include hardware, software, and firmware.
Sources:
NIST SP 800-161r1 under system component