NIST SP 800-53

1. Control catalog

   Rev 5 control catalog organized into 20 families such as AC, AU, IA, SC and SI.

2. SP 800-53B baselines

   Low, moderate and high control baselines and tailoring guidance.

3. SP 800-53A assessment procedures

   Examine, interview and test assessment methods and objects for each control.

4. OSCAL

   Machine-readable OSCAL catalogs and profiles for 800-53 controls.

5. Risk Management Framework

   Risk Management Framework steps (prepare through monitor) that use 800-53 controls.

6. Online catalog

   Comprehensive Risk Tool for browsing and filtering control catalogs.

Each section links to the official page. Titles and summaries by Extra Credit; the docs belong to their authors.