What is atkinsons-shiffrins classic three stage processing model of memory?

Atkinson and Shiffrin's classic three-stage processing model of memory posits that memory is structured in three distinct stages: sensory memory, short-term memory, and long-term memory. Sensory memory briefly holds incoming sensory information, short-term memory retains a limited amount of information for a short duration, and long-term memory stores information more permanently and with greater capacity. This model illustrates how information is encoded, stored, and retrieved, highlighting the progression from fleeting sensory input to more durable memory storage.