Memory is the process of encoding, storing and retrieving information received by the senses. Encoding describes how information in the form of stimuli reaches the senses, storage is concerned with maintaining information over time and retrieval is the process of locating stored information and bringing this data into consciousness. Memory also refers to the act of remembering and the act remembered. Memory is not exclusive to human beings; memory is an organism’s ability to store, retain and recall experiences and information. The study of memory started in the field of philosophy and was later included in the fields of cognitive psychology and cognitive neuroscience. Memory can be classified according to information type and whether the information to be recalled is from the past (retrospective) or to be remembered in the future (prospective).