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Recommendation

Definitions:

  A special publication of the ITL that stipulates specific characteristics of the technology to use or the procedures to follow to achieve a common level of quality or level of interoperability.
Sources:
FIPS 201-3

  A term used to refer to this specific document (i.e., SP 800-133): the “R” is always capitalized.
Sources:
NIST SP 800-133 Rev. 2