What are some examples of occupational licenses thats primary goal is restricting entry and raising wage rates?

It is well known that doctors, dentists, and lawyers must be licensed to practice their professions. But what about occupational therapists, manicurists and barbers? How about fortune tellers, mage therapists, shampoo istants, librarians, beekeepers, electrologists and movie projector operators? These are just a sampling of the hundreds of occupations that require a license in at least some states or counties.