The paper explains implicit memory research to those not knowledgeable about implicit memory. First, I define implicit and explicit memory. Second, I describe phenomena of implicit memory known as priming. Different kinds of priming are discussed in the context of a multiple memory systems account of implicit memory. Third, I compare the strengths and the weaknesses of the memory systems approach and the processing approach to explain implicit memory. The need for a comprehensive theory of memory is discussed. Last, I discuss three important issues for future research: the role of consciousness in implicit and explicit retrieval, comparisons among memory systems and cognitive processing approaches, and procedual memory as a point of contact of body and mind.