Sensory register, short-term store, and long-term store are the three main components of the Multi-Store Model of memory.
According to Atkinson & Shiffrin, memory is a linear process where information is processed by the senses, then transferred to short-term memory if attended to, and finally rehearsed into long-term memory.
Information can only enter long-term memory if it passes through short-term memory first.
In the MSM of memory if information is attended to it passes from the sensory store into short-term memory.
In the MSM if information is rehearsed it passes from short-term into long-term memory.
The Multi-Store Model was devised by Atkinson & Shiffrin (1968).
To use the information in LTM we need to bring it out of the long-term memory and back into STM. This process is called retrieval.
All stimuli from the outsideworld if attended to passes into the sensory register.