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Deborah Alpert Sleight discusses what is meant by an EPSS in her article "What is Electronic Performance Support and What Isn’t?". She describes a two part characteristic of EPSS which is, firstly, "access to the specific information and tools needed to perform a task," and secondly, "access to the information and tools at the time the task is to be performed." Both parts need to be present for it to be a characteristic related to an effective EPSS. She continues her discussion that the specific information can be provided in various media, including textual, visual, audio, computer programs/tools, along with advice or guidance.