Plato and Aristotle compared memory to a block of wax that differed in size and hardness for various individuals…remembering was like stamping an impression into the wax.
Today, with technological advances, the analogies have become much more sophisticated.
Atkinson and Shiffrin, 1968, proposed an analogy between information storage by computers and information storage in human memory–the information-processing approach.
Basically, this approach divides memory into 3 different stores: sensory, short-term memory, and long-term memory.
This is depicted in the following figure.