A Solaris OE feature taken from the Trusted Solaris Operating Environment, RBAC enables an organization to assign or limit individual rights to perform specific operations. RBAC separates powers and controls the delegation of privileged operations to individual users, allowing the system manager to limit access to administration and partition root privileges among a group of administrators. RBAC minimizes the chance that any user will go beyond their realm of expertise and inadvertently - or intentionally - make a change that results in a system failure.

Role Based Access Control – a methodology defined by NIST for defining access rights by the roles that an individual performs in an organisation. See csrc.nist.gov/rbac

Role-Based Access Control. An alternative to the all-or-nothing superuser model. RBAC lets an organization separate superuser's capabilities and assign them to special user accounts called roles. Roles can be assigned to specific individuals, according to their job needs.