Sometimes lifelong learning aims to provide educational opportunities outside standard educational systems—which can be cost-prohibitive, if available at all. On the other hand, formal administrative units devoted to this discipline exist in a number of universities. For example, the 'Academy of Lifelong Learning' is an administrative unit within the University-wide 'Professional and Continuing Studies' unit at the University of Delaware. Another example is the Jagiellonian University Extension (Wszechnica Uniwersytetu Jagiellonskiego), which is one of the most comprehensive Polish centers for lifelong learning (open learning, organizational learning, community learning).