(EPSS) A system that provides electronic task guidance and support to the user at the moment of need. EPSS can provide application help, reference information, guided instructions and/or tutorials, subject matter expert advice and hints on how to perform a task more efficiently. An EPSS can combine various technologies to present the desired information. The information can be in the form of text, graphical displays, sound, and video presentations.

["Electronic Performance Support Systems: How and Why to Remake the Workplace Through the Strategic Application of Technology", Gloria Gerry, Weingarten Press].