Final answer:
Memory is an information processing system that encodes, stores, and retrieves information over time.
Step-by-step explanation:
Memory is an information processing system that encodes, stores, and retrieves information over time. It is often compared to a computer. There are three main functions of memory: encoding, storage, and retrieval. Encoding is the process of getting information into our memory system, while storage is the retention of information, and retrieval is the act of accessing information from storage. The Atkinson-Shiffrin model of memory suggests that information moves from sensory memory to short-term memory and then to long-term memory.