Final answer:
Short-term memory (STM) is the temporary storage system that holds about seven or so items of information for about twenty seconds.
Step-by-step explanation:
The temporary storage system that holds about seven or so items of information for about twenty seconds is Short-term memory (STM). Short-term memory is a temporary storage system that processes incoming sensory memory. It takes information from sensory memory and sometimes connects that memory to something already in long-term memory.