Which memory system is the one that is a working, active system that processes the information within it? secondary memory cognitive dissonance long-term memory short-term memory?

Short term memory is a memory system is the one that is a working, active system that processes the information within it. Short term memory is the capacity for holding, but not manipulating, a small amount of information in mind in an active, readily available state for a short period of time. In contrast, the long-term can hold an indefinite amount of information.