Which NIST SP series document is concerned with continuous monitoring for federal information systems and organizations? Response:

NIST SP 800-144, "Guidelines on Security and Privacy in Public Cloud Computing," focuses on cloud security considerations.

NIST SP 800-64, "Security Considerations in the System Development Life Cycle," deals with integrating security into the SDLC.

NIST SP 800-137, titled "Information Security Continuous Monitoring (ISCM) for Federal Information Systems and Organizations," specifically outlines the process for implementing and managing continuous monitoring to maintain ongoing awareness of an organization's security posture.

NIST SP 800-26, "Security Self-Assessment Guide for Information Technology Systems," provided guidance for self-assessments but is largely superseded by other documents.