The complexity of the modern workplace means that decision makers are entertaining the idea of providing employees with software applications that are designed to provide true support and on-the-job training from the employee's desktop computer. An electronic performance support system (EPSS) is the tool that can make such training a reality when it is needed. In describing an EPSS there are two areas to consider--the content and the components of the system. Ideally the components of a complex EPSS include a combination of hypermedia databases, expert systems, modular interactive training, a dynamic maintenance system, and other interactive software support applications, while a simple EPSS may include only a database and an online help system. Leaders of industrial training predict a need for a new paradigm of job-related training within the next few years. If the EPSS proves to be part of this approach, a theoretical base must be established. Strengths and weaknesses of the EPSS must be recognized. Employers and employees may not be ready to adopt a new mind-set on how training and support should be conducted on the job. Before the EPSS can be fully accepted, both technology and attitudes must change. (Contains 8 references.) (SLD)