NIST
The National Institute of Standards and Technology (NIST) is a well-known nonregulatory federal agency within the U.S. Commerce Department’s Technology Administration. The Computer Security Division (CSD) is one of seven divisions within NIST’s Information Technology Laboratory. NIST’s Cybersecurity Framework is a collection of industry standards and best practices to help organizations manage cybersecurity risks. This framework is created in collaboration among the United States government, corporations, and individuals. The NIST Cybersecurity Framework can be accessed at https://www.nist.gov/cyberframework.
FIPS
Federal Information Processing Standards (FIPS): This is the official publication series for standards and guidelines.
SP 800 series
This series reports on ITL research, guidelines, and outreach efforts in information system security and its collaborative activities with industry, government, and academic organizations. SP 800 series documents can be downloaded from https://csrc.nist.gov/publications/sp800.
SP 1800 series
This series focuses on cybersecurity practices and guidelines. SP 1800 series document can be downloaded from https://csrc.nist.gov/publications/sp1800.