This paper describes details involved in the transition of a mainframe, batch mode SAS system to a SAS/AF Frame Entry application using Windows(R) point-click techniques.The Proficiency Analytical Testing (PAT) Program is a joint effort of the National Institute for Occupational Safety and Health (NIOSH) and the American Industrial Hygiene Association (AIHA) to improve the performance of industrial hygiene laboratories. Over 1400 industrial hygiene laboratories throughout the United States and Canada participate. Participants analyze a series of metals, silica, asbestos, and organic solvent samples and receive performance ratings quarterly. These ratings are used by a professional society, AIHA, to accredit industrial hygiene laboratories.The PAT System Is a SAS application which manages computer aspects of the PAT program,including database management, data analysis, and report production, The system originally ran under IBM mainframe SAS 607. Due to rising mainframe costs, the advent of high powered PCs and the ease of managing desktop applications, the PAT system was converted to a more user-friendly less expensive, PC based system.This paper discusses the processes of the transition, including movement of SAS files using SAS/CONNECT, movement of program files, incorporation of the original SAS programs with AF Frame Entries, development of a user-friendly AF application, and issues (file backup, advantages) under the PC environment.SAS software used includes: SAS/BASE, SAS/GRAPH, SAS/STAT, SAS/FSP, SAS/AF Frame SAS/CONNECT.