This reference handbook is designed to provide students, clients, counselors, and other interested persons with information about the occupations that require licensing and certification in the state of Oklahoma. Information is presented on 103 occupations. Each licensed and certified listing includes a brief job description, licensing requirements, information concerning examination, fees, education/training requirements, the name and address of the licensing agency, address and telephone number of licensing agency, the fourth edition "Dictionary of Occupational Titles" code numbers, and the "Standard Occupational Classification" code numbers. (YLB)