man pages section 5: Standards, Environments, and Macros
    
R
 
 rbac - role-based access control ( Index Term Link )
 
 regex - internationalized basic and extended regular expression matching ( Index Term Link )
 
 regular expression compile and match routines
  -- advance ( Index Term Link )
  -- compile ( Index Term Link )
  -- regexp ( Index Term Link )
  -- step ( Index Term Link )
 
 role-based access control - rbac ( Index Term Link )