RACF [pronounced Rack-Eff], short for Resource Access Control Facility, is an IBM software product.
[3] There is a long established technical support community for RACF based around a LISTSERV operated out of the University of Georgia.
[4][5] The first text book published (first printing December 2007) aimed at giving security professionals an introduction to the concepts and conventions of how RACF is designed and administered was Mainframe Basics for Security Professionals: Getting Started with RACF by Ori Pomerantz, Barbara Vander Weele, Mark Nelson, and Tim Hahn.
[3] RACF has continuously evolved[6] to support such modern security features as digital certificates/public key infrastructure services, LDAP interfaces, and case sensitive IDs/passwords.
Major mainframe subsystems, especially Db2, use RACF to provide multi-level security (MLS).