The document summarizes the Atkinson-Shiffrin model of memory. It proposes that human memory consists of three main stores: sensory memory, short-term memory, and long-term memory. Information enters through the senses and is held briefly in sensory memory. It then transfers to short-term memory if attention is paid. Information in short-term memory can be transferred to long-term memory through rehearsal. Long-term memory has a virtually unlimited capacity and duration. Strategies like organization and repetition can help with retaining information in memory according to this model.