The Center for Internet Security (CIS) is a nonprofit organization focused on enhancing cybersecurity for both public and private sector organizations. It provides a set of best practices and resources, including the CIS Controls, a prioritized set of cybersecurity actions, and the CIS Benchmarks, which offer configuration guidelines to secure systems and networks. CIS also operates the CIS-CAT (Configuration Assessment Tool) to help organizations assess and improve their security posture. Learn more: https://en.wikipedia.org/wiki/CIS