This document provides a comprehensive, up-to-date compilation of data regarding professional and occupational practice requirements in Pennsylvania, focusing on the role of continuing professional education in the various credentialing processes. The material is designed as a resource for those serving Pennsylvania's practitioners through the provision of initial professional education, regulation, and continuing education. It first describes the process of continuous updating and discusses state and national trends regarding regulatory practices. Summaries follow of 69 professions and occupations. They outline the requirements for individuals wishing to obtain mandatory or voluntary credentials and provide background information on the development of the profession or occupation and material on current trends within the field. A section on the climate for continuing education in each summary gives continuing educators an overview of the group's perceived need for and interest in continuing education programs. Lists at the end of each summary provide the names, addresses, and telephone numbers of resource people available to provide information pertaining to certification or licensure and of contact people within professional associations. Briefer synopses of nine additional fields are included. An index of professions and occupations surveyed and five-page reference list are appended. (YLB)