# What this package is all about?

One of the important questions that we can ask about memory is, 'how much information can it hold?' This package is all about the answer to this question. On the next page of this introduction, you can review the learning objectives for this topic, and start deciding how much of it you want to study.

## What is Short Term Memory?

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When psychologists talk about memory, they mean all the mental processes that are involved in storing and retrieving information. There are at least two separate memory systems in the human mind:

System | What it does
--- | ---
Short Term Memory (STM) | A store for information that you are using right now. This information will either have been taken in from the outside world, or it will have been retrieved from the long term memory
Long Term Memory (LTM) | A store for all the information you are not using right now, but might want to use in the future

You can use the demonstration on the right to find out more about STM and LTM.

Click on the buttons to find out about the processes of short and long term memory

information